Video Studio 11 Capture

[GEB]

Using MSI K9N Platinum MB, 2 Gig Mem, 250 Gig serial drive
Running Vista Ultimate 64 bit. The problem is with VS11, trying to
capture an AVI file using fiewire connection with ADS Pyro A/V link.
VS11 will not capture more than 3 or 4 seconds, then stops and wants
to be restarted. VS10 works OK. If you use same computer but with
Vista Ultimate 32 bit VS11 works OK. Any ideas what the problem is?