Unrecognized attribute 'requirePermission'

http://forum.dotnetpanel.com/forums/p/436/2378.aspx

http://forums.asp.net/p/1464294/3382327.aspx

I performed disk cleanup, cleaned up temp asp.net files, and set .net framework to 1.1. then applied, and then applied .net framework to 2.0 and then clicked apply again.