Merge replication - can't create snapshot – timeout

Question

I have a SQL Server 2008 database, and I need a merge replication because I want to sync with mobile devices afterwards.

So I created a replication but when it comes to start the snapshot agent, the agent tries to start for about 20 minutes and then it shows the message:

The replication agent has not logged a progress message in 10
minutes. This might indicate an unresponsive agent or high system
activity. Verify that records are being replicated to the destination
and that connections to the Subscriber, Publisher, and Distributor are
still active.

There aren't any other error messages, neither in the snapshot-agent-status-window nor in the agent-log-window.

I don't have the administrator of the domain, but the local administrator and a domain user with admin-privileges. Both have all rights to database, are in the access-list of the replication.

The server agent runs on the local administrator-account and there are *3 Merge Replications working on the server *

The job runs also under the local administrator.