Check this Hotfix. It may relieve the troubles you are experiencing.
http://usa.autodesk.com/adsk/servlet/ps/dl/item?siteID=123112&id=5620053&linkID=4183232
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Jeff Hanson
Autodesk Product Support
Building Solutions Division
Manchester, NH
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wrote in message news:5367420@discussion.autodesk.com...
I have revit 9.1 in association with AutoCAD 2007. Both AutoCAD and Revit
licenses continually fail and require re licensing with Autodesk. This is
now getting to be every two weeks the software requires relicensing.
Autodesk no longer issue activation keys for the software, so i have to
resort to using my reseller.to obtain the codes.
can anyone shed light on this .
Thanks