Alex,
You are correct in installing RIO 2.0 with your LabVIEW 8.0 environment. However, what order did you install your software in? The order should be LabVIEW -> Modules -> Drivers, so you should have installed LabVIEW 8.0, then RT and FPGA 8.0, then your RIO driver and the other drivers on the devices and drivers CD. If you have installed in this order, then you may want to try installing RIO 2.1.3, as this is the latest version. It is normal that the device would not show up in LabVIEW 8.2 since it doesn't look like you have installed RT or FPGA for 8.2.
If you receive the same error with the RIO 2.1.3 driver, then you may want to check your installation of LabVIEW Real Time, and you may want to repair the installation. If all else fails, then you may want to uninstall LabVIEW, it's toolkits and drivers and install them again in the proper order. I hope this helps.
Brian Coalson
Software Engineer
National Instruments