Connection between Universe Designer and BO Server can't be established

Hi ,

I have installed the following components:

Server:

- Business Objects XI 3.1 Enterprise

- Explorer 3.2

Client:

- BO Client Tools

Everything is working fine if I have installed all components on one server

But if I install the Client componenents like the Universe Designer on one Client, I can't connect to the BO Server.

We got the following error:

[repo_proxy 13] Session Facade::openSessionLogon with user info has failed(Transport error: Communication failure. (FWM 00001) (hr=#0x80042a01)

I am sure that I use the right credentials. I have already checked our firewalls and the administration guide. Our firewall is open for the ports 6400 and 8080 (as default). The whireshark-log shows that the network packages are sent between the client and server.

Could you please help me?

Thanks

Alexander