Can't add code file

Hello, i have this problem in UE 4.3 and VS2014 Express.

I successfully connected to my Subversion Server, i am using TorquoiseSVN everything works fine with existing projects.
if i try to add a new project it always tells me

Could not mark ressource file for add

and i can not create a new project!
any help is very apprecriated,

thanks,
best regards