As much as I hate to pull the "read the manual" on you, your question opens up for so many variant issues and possible solutions. Getting the Role Centers with all it's bells and whistles is no walk in the park for sure. There are a lot of steps involved in order to get this right.
Please do refer to the installation guide:
www.microsoft.com/.../details.aspx
When you got it right the second time, the third time will be a lot easier - believe me.