Please help me with converter problem

I have a 8gig Sansa Fuze, the converter software works great with Windows XP but will not work with Vista.  I have installed the newest ver of the converter.

This is the message I get when I open a video to convert.

The Instruction at 0x3100af54 referenced memory at 0x00000000.  The memory could not be read.

Can you please help me fix this

Thanks

Same as before