Please help, Nucleo Pro problems on new computer!

Nucleo seems to be hit and miss as to whether it helps or hurts based on the computer. I've had minimal success with it in the past, but on my newer personal computer it runs fantastic. And now on my latest brand new 64-bit dual-quad Xeon workstation it's having all sorts of problems with Nucleo. Is this a 64 bit issue, or needing a reinstall or what?

First of all, my projects are fairly complex as After Effects goes, however as I said my personal computer has run it fine including Nucleo previews and renders...Though now when I try and run that project on the new xeon 64 bit machine with twice the processing and twice the memory, nucleo takes longer to prepare to do anything, and it always comes up with an error code -6 the first time trying to render something. After that, it seems Nucleo renders blank video when trying to specify an output color space (but it works great if I set it to After Effects render).

Has anyone had these kinds of issues? It's interesting the differences on the same project between different computers. it's stressing me out with the deadlines I have.

Thanks for your help...I love Nucleo when it rocks, just not when it's a trainwreck!

Devin