Windows Vista Home Prem., NO MCAFEE, defender is off.......Java 6.....

Running XP, I could download any file, any size,,,,,

Running Vista, for some odd reason, it will let me download small files (2000kb and smaller)
BUT
will NOT let me download larger files.
Says connecting, and won't go any farther.

Tried free version...same
tried PRO..............same
tried BETA.............same

Is there something in Vista that is blocking a file size? Or is it a Limewire problem?

It's driving me nuts, and most are saying it's a Mcafee or Java prob.....I don't have McAfee, and DO have the latest Java......

Help!!!
'Pete