Click Here for 4 updated Drivers for that device written for Vista x64.....
DLoad all 4 and give them unique names so you can keep track.
Install them 1 at a time...i'll bet a cold Lager at least 1 of them works....
Note #1 The hangup here is not Win7...it's the fact that you have migrated to a 64bit OS...the machine originally shipped with Vista 32bit...
Note #2 Installing the wrong driver while testing my theory will not harm any hardware nor your OS install so not to worry...the Tech that said to not use Vista drivers can assist in buying the Lager...