Exchange 2010 SP3 Upgrade Unexpected Error on CAS

Hi there,  

I have just Upgraded our Exchange 2010 SP1 server to SP3 and everything goes fine until it gets to the Client Access Role portion of the setup.  When it get to this section it comes up with the following error:

Error: The following error was generated when "$error.Clear();

$file = 'Microsoft.Exchange.Pop3.exe.config'; $template = $file + '.template'; $relPath = 'ClientAccess\PopImap'; $fullPath = [System.IO.Path]::Combine($RoleInstallPath, $relPath); Set-InstallPathInAppConfig -ConfigFileRelativePath $relPath -ConfigFileName $template; Preserve-AppSettings -RoleInstallPath $fullPath -ConfigFileName $file; " was run: "'”' is an unexpected token. The expected token is '"' or '''. Line 9, position 28. (C:\Program Files\Microsoft\Exchange Server\V14\ClientAccess\PopImap\Microsoft.Exchange.Pop3.exe.config line 9)". '”' is an unexpected token. The expected token is '"' or '''. Line 9, position 28. (C:\Program Files\Microsoft\Exchange Server\V14\ClientAccess\PopImap\Microsoft.Exchange.Pop3.exe.config line 9) '”' is an unexpected token. The expected token is '"' or '''. Line 9, position 28. 

just wondering if anyone knows what the problem could be or what could be causing it.  Everything else has been working fine so far.

thanks

Darren