EP access problem

Hi,

I configure EP and it is working fine in server but it is asking credential detailes in other clients.

After giving credential it is showing the error in report parts as

HTTP Error 401.2 - Unauthorized: Access is denied due to server configuration.

Internet Information Services (IIS)

and in otherweb parts

An error has occurred while establishing a connection to the analysis server.

I added user in Report server,Analysis server and EP site.

I can access reports from AX client machine but not report server. It is asking credential and after giving credential it is showing the error

You are not authorized to view this page

HTTP Error 401.1 - Unauthorized: Access is denied due to invalid credentials.
Internet Information Services (IIS).

I can validate report server URL from server but it is showing the error from other client having the administrator previllage.

http://aossrvr:80/reportserver - failed: The address is invalid or unavailable. Check the URL and try again.

How I can solve this issues.

Thanks in Advance.