Hi Simon,
After you notified me on drivers, i made a search on internet for Ati Radeon 2600 Series.
I solved all my problems with Ati Radeon Graphical Cards .
i am sure more than 90% of Ati-Linux ( Fedora RedHat Ubuntu etc) problems have been solved.

On a site i saw that last month AMD declared its new OpenSource Software Policy.
AMD decided to support Open Source mainly Linux for its products. Also AMD will show best effort to share info with Open Source communities.

At 5th of this March Ati had put its Linux drivers to ati.amd.com website.

For Ati Graphic Drivers you can look at the following Url.

http://ati.amd.com/support/driver.html

After downloading the file from ati official website, it took my 4-5 minutes to install necessary drivers by reading ati documentation.

Now my both screens work fine with the exact resolutions.

Thank you very much, Simon for giving your very valuable time to send me posts.
If you did not sent me those posts, i would never able to show necessary effort except cross exchange cables
Hope this post will be beneficial for others who look Ati graphic card drivers ( driver ) for linux .

That's fine but:

Free/GPL drivers find there way into the kernel quite rapidly. You should seldom need to use the ATI site.

ATI have had a history of releasing HW specs to free-software once they turn legacy. The newest cards continue to be proprietary only. OTOH: fglrx has finally caught up with the free driver offering aiglx support.

Installing the proprietary drivec off the amd website is not recommended.