Android VPN connection keeps droppingseconds after connecting

I setup L2TP/IPSec VPN with PSK on TMG 2010 but when connecting an Android device, the VPN connection keeps dropping seconds after connecting. All other devices are fine.

I have found the hotfix that would almost certainly fix the issue, the link to it however (http://support.microsoft.com/kb/2722729) isn't working.

I've checked if it is included in this month's updates for TMG but it isn't.

Does anyone have any suggestions? Surely, there must be thousands of Android users out there who connect to a TMG firewall for their VPN.

Thanks

Marco S