"I reinstalled CD Burning ROM (nero 5)", this sentence is not clear. have you even installed nero 5 in this new computer before? If yes, question may be that the uninstallation is not complete. you should remove all files and register of nero when gonna reinstall it at the same computer.

If not. I guess you mean the old computer have one nero, and then you install nero to your new computer. the question is this new nero 5 in new computer doesn't read the old computer's music folder? Something here. be sure you have installed the nero 5 completely. can it read music folder from the new computer?

Thanks to both for repsonding, Maybe I should clarify my questions/problem:

I bought a Brand new computer. I copied all of my music (Nero compilations, and other music) from by backup of my old computer documents to my new computers hard drive. I then installed Nero 5 using the original disc. 

First Problem: When I tried to open any of Nero compliations I had previously made. It starts to open  however, they come up blank saying some files are either missing or have been moved.

Second problem. The program won't or can't access my other music (orignal cd downloads in my music folder). When in the right pane I go to clikc on mu music folder to dispaly my CD's.  I get a message "cannot access this folder".

Hopefully this helps. Thanks Again