One more thing.. Since Xen is VDI and not the same as a Citrix RDP session, the use of session type detection AND forcing it to be ICA format may not be valid. I'll be able to get into the lab this afternoon and confirm what the sessiontype returns on our Xen system, but for what you want to do, it just complicates things - remove it for now.
Glenn
_________________________
Actually I
am a Rocket Scientist!
