more help needed !

[Glint]

Can anyone tell me how to unroll the security on Vista so pbem .btefiles can be loaded and allowed by Vista.
I had a report come up that said the file maybe blocked as it came from another computer.
I downloaded the file from my PC, loaded it to my memory stick and transferred it to my Vista laptop, think that's where the problem lays regarding not being able to play pbem but standard games against the a1 play ok?
regards
Peter