Hi, I'm noticing that a number of you are having this problem, as are lots of people on the citrix forum. ( see: http://support.citrix.com/forums/thread.jspa?forumID=1&threadID=40189 ) As far as I can see, this behaviour started when MS03-026 (the Blaster Worm Fix) was put on our servers. A suggestion was made to remove this and put MS03-039 on instead, which seems to have solved problems for some people - not us unfortunately. Does anyone have some other suggestions? ( We're on FR2 with Windows 2000 Service Pack 3. (worried about updating to SP4 / FR3 as have heard many horror stories about this!!)) Regards Nik Hunt Systems Administrator BM Polyco Ltd Disclaimer This E-Mail and the information it contains are confidential. If you have received this message in error please notify us immediately. You should not use it or copy it for any purpose nor disclose its contents to any other party. The contents of this communication are advisory and are not binding on the Company unless supported by authorised documentation. This message has been checked for all known viruses by F-Secure before sending. It has also passed through the SkyScan Anti-Virus service powered by MessageLabs for total peace of mind.