troubles with fms on xp - using a usb type connector

[dbgain]

I recently purchased a connector for my jr Quattro transmitter. It connects using a usb port. initially it worked great, then kept locking up. now it seems everytime I connect to my transmitter I don't have any controls. I check to make sure the com port is set right and that I have the right com port selected on the fms software however when I try to calibrate the controls nothing. I messed around with it and got it working again once not knowing what I did to fix it but the next time I went to use it the same problem occured. even shut windows clear down once. any help would be appreciated.