I bought the Version 2.00.214 of Real Flight from a vendor on ebay. He told me the interface I have used for the FMS would work fine. I have contacted him to no avail and have tried nearly everything to get this going. I am unable to do anything with this program to get it going. Can someone with MUCH more knowlege help me out here. I have a 1.5 gHz Pentium and running Win. 98. I have used the Airtronics with FMS and wanted to move up. I hope my $75.00 wasn't spent in vain. Sure would appreciate any guidance. Thank you very much in advance