win98 registry

When I delete office 97 standard and install office 97 professional,then launch Access it says it can't start because there is no license for it on the machine. Word, Excel and Powerpoint all work fine. Prior to the install, I have deleted any reg. keys relating to Office,I've tried Eraser97 and Offclean and still get the same message.
Any ideas?
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I had the same problem a while back. Here's an article I found on MS Knowledge base:

Q141373 "There Is No License" Error Starting Microsoft Access

Goto http://support.microsoft.com/support...SRCH&SPR=MSALL for the fix.

Just for reference http://search.support.microsoft.com/kb/c.asp - MS Knowledge Base