Error message: "File not found..."

Hello,
    I just installed Delphi 5 on Windows 2000.  I've copied over all project
files from another computer and reinstalled all components etc.  If I'm
logged on as Administrator all is well.  However if I log on as anyone else
I get the error message "File not found: 'd:\program
files\borland\delphi5\lib\the name of the file here' " when trying to
compile.  The files are in fact there and are in the search path. No
question about that.  Does this have something to do with security
permissions?

Thanks for your help!
-Dave