Can't call by drag and drop

I am a bit new to all this FreePBX/Asterix/Hudlite stuff tbh, but I will try and give the most info I can.

I am using Hud-lite version 1.1.160.1 together with X-lite v.3.0 build 30942 on the same Windows XP machine. I have a trixbox setup 2.0 with Asterisk 1.2.13 svn. I also have a couple of grandstream phones.

My problem is this: The grandstream phones and X-Lite can phone eachother without problems. Hud-Lite also displays their status, i.e. purple buttons etc. I can make calls through Hud-lite by typing the number and pressing Call -> redirecting it to X-Lite. I can also make two extensions phone eachother by drag/drop. However, I cannot drag the topleft extension to another extension to make a call.

Any ideas, please? BTW - qualify=yes for all the extensions.