File open/save delay

Hello,

When I install new server with new name, then remove old server then the
client when first open file dialog box (in any application) delay about 20
sec. I check network mappings and it's OK. User documents and settings are
also in good location.
The problem is that client try to locate old server. But I don't now why. I
also check GPO and there is no link to old server.
When I remove old user profile the problem persist.

Please help me.