Hi Andrew,
How did you setup your webtype ACL?
Did you configure a permit tcp for RDP to your server?
If so, this is not how it should be done as you should permit this link through an URL entry that would look like this:
access-list test webtype permit url rdp://1.1.1.1
If that was the case, can you verify that the ACL is correctly bound to your user with the "
show vpn-sessiondb detail webvpn" command?
Regards,
Nicolas