Issue with Group Policy Administrative Templates after upgrading Domain Controllers from Windows 2003 (x86) to 2008 (x86)

HI There,

We have 20 Domain Controllers in our environment and recent;y started upgrading Domain Controllers from Windows 2003 to Windows 2008 OS. So far we have upgraded 12 Domain Controllers.

I observed that, we have issues with Group policies which are using Administrative Templates are no longer working. We get below error message.

The client-side extension could not apply user policy settings for '<Filed GPO Name>' because it failed with error code '0x80070003 The system cannot find the path specified.' See trace file for more details.

When I try to open the problematic policy on Windows 2008 DC it gives following error,

Expected one of the following possible element(s), <text>,<decimalTextBox>, <textBox>, <checkBox>, <comboBox>, <dropdownList>, <listBox>, but found <multiTextBox> instead. File \\<FQDN of DC>\sysvol\contoso.com\Policies\PolicyDefinitions\en-US\terminalserver-Server.adml, line 198, column 60
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Can someone please suggest me how to solve this?

Thanks

Mahi