Wily Instroscope Agent connection problem to Enterprise Manager

Hello!

Perhapse some of you guys deal with this problem before and can give me an hint?

I install the Wily Introscope Enterprise Manager and one Agent according to the "Introscope Version 7.0 Installation Guide for SAP" but if i try to start the agent i get the Warning: [IntroscopeAgent.ConnectionThread] Failed to connect to the Introscope Enterprise Manager at <server>:6001, com.wily.isengard.postofficehub.link.net.DefaultSocketFactory (1)

I checked if the server is reachable with ping and also if the port is open via telnet from the system where i have installed the Agent.

Any ideas?

King regards, Stefan