Have you seen this article ? http://support.citrix.com/kb/entry.jspa?entryID=11078 ----- Original Message ----- From: Matthew Shrewsbury To: thin@xxxxxxxxxxxxx Sent: Friday, January 19, 2007 1:46 PM Subject: [THIN] Access Gateway protocal driver error I'm going nuts trying to figure out why I intermittently receive a Protocol Driver Error when attempting to launch a Citrix application through Access Gateway with Advanced Access Control. Normally if I wait a moment and try again it works just fine. Has anyone else had this issue? I've searched a number of forums and not had any success in finding a solution. Matthew Shrewsbury Network Manager