internet explorer 7 or 8 + group policy

[Perkins]

I am using Windows 2003 Domain Controller and use group policy for internet explorer settings. I have enabled the User Configuration (Enabled)\Windows Settings\Internet Explorer Maintenance\Connection/Proxy Settings\HTTP:192.168.2.1 and Administrative Templates\Windows Components/Internet Explorer\Policy Setting\Disable changing proxy settings. As per the settings all users proxy server is 192.168.2.2 and users are not able to change their proxy settings. For some users, if you upgrade internet explorer 6 to 7 or 8, then we are not able to see proxy server IP address, it seems to be empty for some users. So, can anyone tell me how to fix this issue? Thanks

[Big Fish]

Did you also try to add or copy the IE8 .adm file to the administrative templates? Thanks.

[Perkins]

Thanks for the response, but I am not able to find the IE8 .adm file.