Delay during change collection against TFS

Hi,

we've changed the majority of our repositories to TFS instead of Subversion.

Since the migration we experience a huge delay after a build starts. Regarding the build-log the delay occures during the change collection.

The log file "teamcity-vcs.log" also shows that this step takes long

"Finish collecting changes for tfs: <http://tfsurl> <$/Repo> {id=15} from version 1862 to version 1864; 0 changes collected 0 changes reported, time spent: 2m:23s,396ms "

Compared with a check for changes on the Subversion server

"Finish collecting changes for svn: <http://svn> {id=5} from version 34_2011/02/16 15:06:10 +0100 to version 34_2011/02/16 15:07:15 +0100; 0 changes collected 0 changes reported, time spent: 94ms "

There should be no network issue as the TFS responds very fast from VS or other tools.

I've searched this forum and found this topic: http://devnet.jetbrains.net/message/5264625#5264625

I've already executed the commands recommended there and the result is, that the command line is as fast as VS so I don't have any clue why it takes minutes for the server.

Thanks for any hints