Studio Instruments "cannot loan multi sample" error

Hi all.

I upgraded my PC to Win 7 x64 and having problems with Studio Instruments.

Upon opening up the SI soft synth i am getting error messages that it cannot load multi-sample. It doesn't happen with all of the kits, some load fine... however most of them don't.

Am i missing something?

Thanks in advance

Bob

PS I'm pretty sure i am scanning the correct folders.