Framemaker 10 crashes a lot

I'm running Framemaker 10 on a Windows 7, 64-bit machine, and it crashes all the time. It used to be when I had two documents open in a book. Now, I don't open two documents but that's seriously impacting on my productivity and the product's utility - every time I check a cross-ref to another document in a book it crashes.

Today, I was just searching in the same document.

All of these documents were created with Framemaker 7.x on a 32-bit system.

PLEASE HELP me.

Thanks.