[THIN] KB: CTX104635 - When running Microsoft Windows Messenger 4.7 through a seamless ICA session, intermittently, the ICA session drops
- From: "Jim Kenzig http://thethin.net" <jimkenz@xxxxxxxxxxxxxx>
- To: thin@xxxxxxxxxxxxx
- Date: Wed, 17 Nov 2004 04:16:58 -0800 (PST)
CTX104635 - When running Microsoft Windows Messenger 4.7 through a seamless ICA
session, intermittently, the ICA session drops
This document was published at:
http://support.citrix.com/kb/entry.jspa?externalID=CTX104635
Document ID: CTX104635, Created on: Sep 7, 2004, Updated: Nov 16, 2004
Products: Citrix MetaFrame XP 1.0 for Microsoft Windows 2003, Citrix MetaFrame
Presentation Server 3.0 for Microsoft Windows 2003
Symptoms
When running Microsoft Windows Messenger 4.7 through a seamless ICA session,
intermittently, the ICA session drops. Reconnecting to the ICA is not possible
as the ICA session no longer exist. No exceptions (Dr. Watson) are reported for
either Windows Messenger or ICA Client modules.
Cause
Microsoft Windows Messenger 4.3 in some situations does not interact well with
the Citrix Active Accessibility Event Hooking DLL; sehook.dll.
Resolution
Disabling sehook.dll, by renaming sehook.dll and rebooting the server provides
a workaround to the problem.#65533; Citrix Active Accessibility Event Hooking
can be disabled through the registry by installing Hotfix XE103W2K3037 or it?s
MetaFrame Product/Operating System equivalent and enabling the seamless flag
0x4 as detailed below.
WARNING: Using Registry Editor incorrectly can cause serious problems that may
require you to reinstall Windows Operation System. We cannot guarantee that
problems resulting from the incorrect use of Registry Editor can be solved.
Using the Registry Editor is at your own risk.
For information about how to edit the registry, view ?Changing Keys and Values
online Help topic? in Registry Editor (Regedit.exe). Note that you should make
a backup copy of the registry files (System.dat and User.dat) before you edit
the registry.
Add the following registry key manually, if it does not exist.
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Citrix\Wfshell\TWI
Type: REG_DWORD
Data: SeamlessFlags=0x4
When the SeamlessFlags=0x4 is set sehook.dll will not be loaded.
More Information
CTX101644 ? Seamless Exception Registry Flags
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