Avaya outlook client error when opening voice messages

We have some client PC's that are getting the following error message when opening voice messages within Outlook:

Unable to initialize the voice player.

An unexpected error has occurred.  Close and restart the application.  If the problem persists, contact your system administrator.


This is happening on one Windows XP SP3 machine, and all Windows 7 machines.

Main problem is the XP machine.  I've tried uninstalling and reinstalling, downloaded the latest version, checked the settings, and also tried as a different user.  The problem is on the machine itself.  However, I can no longer uninstall the MM Client, it comes up with "Fatal error has occured" during the uninstall.

There are no firewalls running, all other options in the OTC can be accessed.  Just can't play messages through the phone.

Any suggestions to get this to work without reinstalling windows on the XP machine?  and any suggestions at all for the Windows 7 machines?
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What happens when you go into outlook and turn off the plugin before you uninstall the MM client?  Let me do some looking on the Windows 7 bit, we have Avaya phone system, noone that I know of using the outlook piece...I'll try it...
MCIMAuthor Commented:
Well, found my own answer.  

We have MM server v4, the OTC client that was being installed on WIndows XP and Windows 7 machines was v5.2  This version will not work with the v4 MM server.  I was able to update the v5.2 software we had to the latest version and then I was able to uninstall it.  

I then downloaded the latest version of the v4 OTC client, installed and it works great for the Windows XP computers.

Windows 7 and Office 2010 do not have any offical supported version yet of the OTC client.  v5.2 does work, but since we only have the v4 server, it won't work in our enviroment.  We will have to upgrade our MM server to v5.2 or the latest version to get it to work with Windows 7 clients running Office 2010.

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Cool, Glad you got a solution!
MCIMAuthor Commented:
Bummer that it took so long to find the answer, and that I found it myself, but glad I found it.
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