I am using rhel5 server but I cannot configure my graph card resolution. please tell me how to re install the graphic card my system is Wipro netpower which has an Intel graphic on board

If you're running RHEL, don't you have support from RH? I thought that some of the packages in RHEL were proprietary, and that you have to purchase a support contract to use those packages.

Intel has released their video drivers as open source, so download the Intel video driver source code, compile the module, modprobe it, set the driver to "intel" in xorg.conf (or run Xorg -configure) and you should be running with no problem.

Before doing all that, check the RHEL repositories for the Intel driver(s). They've been in the Fedora repositories for some time now, so they should have been moved to RHEL by now. (When did you list update your system? I would have expected that driver to have been included in any recent kernel update.)

Note: I only run Fedora (being retired and having no need for "enterprise" level support) so I don't use RHEL and may, therefore, be way off the mark with my comments, above. But you had several people view your post with no response, so I thought I'd take a stab at one.