Hello this seems to be a very common issue with AnyConnect working on Mac OS X. A lot of random sites talk about this.
I have a Cisco 2801 running IOS 12.4(22)T (ADV ENT SRV) with AnyConnect 2.3 package installed.
From Windows I can connect without any issues.
From a Mac OS X after providing login credentials the AnyConnect log says its connecting... checking for updates... and then disconnects.
If this does work on Mac OS X what is needed (or needs to be configured) to get this to work properly on Mac OS X?