Unable to submit timesheets on project server 2013

Dear,

I installed virtual Machine running Windows Server2012, TFS 2013, ProjectServer 2013 and SharePoint 2013.

I can create a teamproject in TFS, add it to project server and open it in Project professional 2013 and see all my tasks in timesheet

I add my hours but i cannot submit my work through timesheet / Send / ... All 3 possibilities are greyed out

When I click ont the taskname in timesheetsview I can Send my work, the timesheet gets approved by the approval but the process status stays "Not submitted"

http://social.technet.microsoft.com/Forums/getfile/442806

I suppose it has something to do with security rights but i haven't found anything that works

Can you say what to do ?

Thanks in advance,

Kris

developer