VS 2008 Solution Auto checks out everytime

We are using "Microsoft Visual Studio 2008 Team Explorer Vers开发者_如何转开发ion 9.0.21022.8"

Whenever i open the solution, try to build or try to get latest team explorer automatically checks out the solution.

When i try to check-in displays that files are identical and check-in undone by server.

what is the reason of this behaviour?

The best solution to prevent accidental check outs seems to be to change your settings:

-> Options -> Source Control -> Environment -> Checked-in item Behaviour: Prompt for check-out

Visual studio will still try to checkout files but you won't accidentally check out files any more.

After some search on solution files i found that one of our colleague connected TFS with its name rahter than using IP. We make all TFS connections same and problem is solve.

P.S: This applies also other version of visual studio.