When using the RealFlight USB Interlink Controller, you
receive an error message that says the USB Interlink Controller is not
connected.
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When using the RealFlight USB Interlink Controller, you receive an error
message that says KEerror 3994 I-Controller does not appear in the Control
Panel.
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Make sure you have all the latest updates for your
version of Windows. This is especially important if you have Windows 98
First Edition since full support for USB did not become available until
Windows 98 Second Edition. You can access the Windows Update feature
from your Start menu while you are connected to the Internet. For
specific assistance with this feature please contact your computer
manufacturer or Microsoft.
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Make sure you have all the latest updates for
RealFlight itself. You can access the latest update for RealFlight by
first making sure that RealFlight itself is not running, and then
calling up the RealFlight Control Panel making sure you are connected to
the Internet through your ISP. On the RealFlight Control Panel, Click on
the Online Updates button. From the Online Updating dialog box, you will
first need to register your copy of RealFlight before you update to the
latest version. The product update is only available to registered
owners of RealFlight.
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If you are using the USB Interlink Controller through
any kind of an external USB hub, make sure the hub has a power supply as
the USB Interlink Controller will not work otherwise.
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If you had the USB Interlink Controller plugged into
your system before you installed RealFlight, then please try
disconnecting the USB Interlink Controller and any other USB device from
your PC and restart your system. Once Windows is completely rebooted,
try plugging your USB Interlink Controller back into a USB port, making
sure you plug the USB connection firmly into the USB port.
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If Step 4 did not provide you with a successful
solution, then please try uninstalling and re-installing RealFlight,
making sure you DO NOT connect the USB Interlink Controller to your PC
until the software prompts you to do so (a message will appear on your
screen when the software is ready for you to plug the USB Interlink
Controller into a USB port). If you are using Norton Antivirus, Norton
Utilities, Norton System Works, or any other virus scan or system
protection/monitoring utility, please make sure that all those utilities
are completely disabled when you install, update, or run RealFlight as
those kinds of utilities can cause conflicts with other programs when
they are attempting to install, update, and/or run successfully.
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If you are still getting an error message that says
the USB Interlink Controller is not connected or KEerror 3994
I-Controller does not appear in the Control Panel, then please close out
of any open windows and dialog boxes that may be open at this time. Make
sure the USB Interlink Controller is the only USB device connected to
your PC at this time. IMPORTANT: make sure you have your Windows
installation/recovery disk there with you in case Windows need to
install components for itself from the Windows disk during the following
process.
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Go to your Start menu and select Settings then Control
Panel.

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From the Windows Control Panel, select the Add New
Hardware option.

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From the Add New Hardware Wizard, Click Next to
continue.

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Click Next to allow the Add New Hardware Wizard to
search for all new Plug and Play devices on your PC.

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Windows is now searching for all Plug and Play devices
on your PC. This process should take several seconds, so please allow
Windows to complete this process.

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Once Windows has detected all the available Plug and
Play devices, you will need to tell Windows you are going to select the
hardware from a list by selecting that option from the window show
below. Once you have made that selection, click Next to continue.

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From the Add New Hardware Wizard dialog box that asks
you to select the type of hardware you want to install, select Human
Interface Devices and click Next to continue.

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Once Windows assembles it’s driver information
database, the Add New Hardware Wizard will ask you to select the
manufacturer and model of the hardware you are adding. Make sure you
have (Standard Device) selected for Manufacturers: and USB Human
Interface Devices selected for Models: as shown and click Next to
continue.

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You should next get the dialog box shown below. Click
Next to install the software necessary to support the new device. If
Windows asks you for the Windows disk, insert the Windows disk and allow
Windows to install any components it needs at this time.

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The Add new Hardware Wizard should have finished
installing the software necessary to support the new hardware device.
Click Finish to complete the process.

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Try running RealFlight again and see if the USB
Interlink Controller is now functioning correctly. If you are still
getting an error message related to the I-Controller not being connected
or not appearing in the Control Panel, then please try contacting
RealFlight Software Support for assistance.