Script for moving directories

[Peramslist]

Hi, I've some files being sftpd into one my servers running Red Hat 9. I need to move the contents of the destination directory  (say testdir) which includes sub directories (test1 and test2)  to another directory (newdir) with the same sub directories. When I tried to move the dirs through a script, I'm getting the error "mv: cannot overwrite directory newdir/test1"   I'd appreciate if you can help with some links or any scripts to solve this issue.     Thanks,   Peram