TeamCity4.01, ClearCase and checkout

Hi.

I'm evaluating TeamCity4.01 and having a problem with ClearCase usage.
I want the TeamCity "Checkout directory" to point to same directory as the "View path". The only problem is that TeamCity is cleaning this directory (deleting the files) when i start to run the config.

How can I turn off the cleanup of the "Checkout directory" ?

/Lars