SQL server registered server problem.

Face a problem when open the SQL2008 studio.
error msg: Unable to read the list of previously registered servers on this system. Re-register your servers in the 'Registered Servers' window. (Microsoft.SqlServer.Management.RegisteredServers)

I try to re-register , but unfortunealy i cant not register. due to:
1) 已注册的服务器
2) Unable to read the list of previously registered ......

So i google aound. but not solve my case.
Finanly i found out, it say cant found "C:\Documents and Settings\Administrator\Local Settings\Temp\1\mcq9rm4p.tmp'

So i create a temp\1 folder.
then the problem solved.