Xcode 4 Source Control Problem

When I use Xcode 4 to open Xcode 3 projects that SCM is already configured, things work fine (although it crashes sometimes).

But when I use "Checkout" and "Add working copy" in the "Repositories" in the organizer, there are problem. The files on the Project Navigator show "?" and "A" for its sour开发者_如何学Cce control badge no matter I checkout or update for how many times.

It seems that the source control function is not connecting correctly to the svn server. It shows nothing when I click "Commit" on the "Source control" menu under "File". And the "Commit Selected Files" is disabled when right click on the files.

Only after clicking on "refresh status" numerous times, I can see the badge showing the correct status and I can update/commit my files for only a few seconds - then everything repeat as mentioned above.....

Does anyone encountered the same problem? I am very disappointed by Apple.

p.s. I use a svn server and it works well on xcode 3.x, eclipse and even command-line console.