Error:Application Server Role, Web Server (IIS) Role: configuration error

Hi,

I am trying to install SharePoint Foundation 2010 Pre-requisites and getting the below error:

Application Server Role, Web Server (IIS) Role: configuration error. The tool was unable to install Application Server Role.Web Server (IIS) Role.

I am using Windows Server 2008 R2 machine and also has IIS 7.0 installed.

Please let me know what needs to be done.

Thanks,

Abdi