Can i access the worldserver tm's with trados studio?

I wanted to access the worldserver (v11) tm's using trados studio 2014 sp2.

Now wenn i insert the credentials (http://...:8080/ws/services, login: admin, password: *****)) i get an error.

"The connection to server(...) could not be established for the reason: (Response is not well-formed XML.).

Does anyone know what i am doing wrong?