Hello there I have had the exact same issue. I have unregistered mobsync and have had zero issues. As a matter of interest are your profiles on a windows 2000/2003 server ? If so have you disbabled offline caching on this share ? Regards ----- Original Message ----- From: Rusty Yates To: thin@xxxxxxxxxxxxx Cc: James Hayes Sent: Wednesday, August 25, 2004 10:29 PM Subject: [THIN] MobSync / Client Side Caching Does anyone know if mobsync / Client Side Caching is need in a Citrix environment. Currently we are using roaming profiles and redirecting the My Documents folder. I'm asking this questions because of the following error: Event Type: Warning Event Source: EventSystem Event Category: (52) Event ID: 4356 Date: 8/25/2004 Time: 4:13:41 PM User: N/A Computer: CITRIX Description: The COM+ Event System failed to create an instance of the subscriber {6295DF2D-35EE-11D1-8707-00C04FD93327}. StandardCreateInstance returned HRESULT 8000401A. I've got a fix from Microsoft - http://support.microsoft.com/?kbid=289650#appliesto But it requires unregistering the Mobsync.dll which will make Client Side Caching no longer work. So do I really need Client Side Caching? Thanks, Rusty Rusty Yates Senior Systems Administrator The Peoples Bank & Trust Company http://www.phcfc.com Mobile: 662-213-9636 Office: 662-680-1566 Fax: 662-680-1502