Cisco AnyConnect to ASA through Balance 710

We have our ASA as remote access VPN endpoint behind a Balance 710. The old IPsec client worked finde but we need to switch to AnyConnect. However, when I try to connect I get a timeout with AnyConnect. If I try connecting to an ASA IF that does not go through the loadbalancer it works fine so I assume the problem is the loadbalancer.
Any ideas what I need to change? I have never worked with Peplink devices bevore. It seems easy enough to work with but I have found nothing regarding SSL traffic on the device.

Okay, found it myself.
Turned out the AnyConnect traffic got its own public IP.