Can’t add Terminal Services Client ActiveX Control” in IE 8

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Can’t add Terminal Services Client ActiveX Control” in IE 8

Microsoft Terminal Services Client ActiveX Control is either not available, or is not enabled

Problem: When trying to access windows SBS 2008 RWW, some client receive this message: “The Microsoft Terminal Services Client ActiveX Control (also known as Microsoft RDP Client Control) is either not available, or is not enabled”.

Case 1: Try to run regsvr32 mstscax.dll which is successful loaded.

Case 2: Make sure the RDC is v6.1. If not, please download it from http://www.microsoft.com/downloads/details.aspx?FamilyId=6E1EC93D-BDBD-4983-92F7-479E088570AD&displaylang=en - Remote Desktop Connection (Terminal Services Client 6.1) for Windows XP (KB952155).

Case 3: Add the Remote Web Workplace Web site to the trusted site list

a. Click Start, click All Programs, and then click Internet Explorer.
b. Click Tools, and then click Internet Options.
c. In Internet Options, click Security.
d. On the Security tab, click Trusted sites, and then click Sites.
e. In Trusted sites, for Add this website to the zone, type your
organization's Web address (URL) for Remote Web Workplace, for example,
https://remote.contoso.com Click Add, and then click Close.

Case 4: Reset IE settings to default:

a. Start IE
b. Click File, and then click Import and Export.
c. Follow the steps in the wizard to export your Favorites.
d. Click Tools, and then click Internet Options.
e. Click Advanced, and then click Reset.

Case 5: Install the below update on the problematic client computers
Some components of an application may not be displayed correctly in a
Terminal Services session if you connect to a terminal server by using RDC
6.1 from a client computer that is running Windows XP SP3, Windows Vista
SP1, or Windows Server 2008
http://support.microsoft.com/kb/958106

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