because I had a problem with a dll that was corupted and coulden't been enymore used by OWA, I decided to reinstall Client Access role. So, I've uninstalled the CA role using setup /mode:uninstall /role:CA without problems, but wen I'm trying to reinstall it I have the folowing error. The same with the graphical wizard.
E:\>setup /mode:install /role:CA
Welcome to Microsoft Exchange Server 2007 Unattended Setup
Preparing Exchange Setup
The following server roles will be installed
Client Access Role
Performing Microsoft Exchange Server Prerequisite Check
Client Access Role Checks ......................... COMPLETED
Configuring Microsoft Exchange Server
Opening package 'E:\exchangeserver.msi' failed. Another version of this pro
duct is already installed. Installation of this version cannot continue. To co
nfigure or remove the existing version of this product, use Add/Remove Programs
on the Control Panel. Error code is 1638.
The Exchange Server setup operation did not complete. Visit http://support.micro
soft.com and enter the Error ID to find more information.
Exchange Server setup encountered an error.
Exchange 2007 - Error code is 1638
Download the Windows Installer Cleanup Utility using the link below:
Clear the following instances of Exchange 2007 using the utility:
1.Microsoft Exchange Server
2. Microsoft Exchange 2007 Enterprise Anti-Spam Signature
3. Microsoft Exchange 2007 Enterprise Block List Update
4. Microsoft Exchange 2007 Standard Anti Spam-filter Update
5. Microsoft Full Test Indexing Engine for Exchange
Set the Exchange 2007 services to ’Automatic’ in services snap-in if they are not set to ’Automatic