Checkpoint Endpoint Security Failed To Topology

Hello all,
i am using a Checkpoint R6 HFA_70 Cluster with a lot of VPN Clients.
The most of them are Secure-Client-Users, which works fine.
I am trying to have a coexistence with Endpoint Connect because i have 2 Users with Windows 7 / 64 Bit. I created a Client like described in the manual and updated the connectra plugin on smartcenter and both firewall-boxes. After that i installed the policy.
SecureClient still works fine.
Endpoint Connect terminates with 'Failed to download Topology' Message.
Any ideas how to solve this?