Issue with websso to owa

Hello I have trouble getting sso (forms) to work when access a owa. The strange thing is that the sso configuration worked when i did set the owa websso config in "SSO Across Authentication Domains", but then the other sso configurations (ntlm) did not work. When i attach the same sso config in the portal access list (as you should do), it wont work. I get a "wrong username or password"

I have a case with f5 on this, but in the meanwhile i wonder if anyone has the same issue? The tech person at f5 said that se had seen this before aswell, but had not find a soultion yet.