out of timing v:60 Hz h: 75 Khz at start up

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i am getting a out of timing v:60 hz h: 75 khz at start up in Ubuntu 8.04 after trying to install the restricted drivers for my radeon sapphire hd 2600 pro agp card, i used this site to install the restricted driver, http://wiki.cchtml.com/index.php/Ubuntu_Hardy_Installation_Guide , i have used other sites to install the card also and have received the same message on my monitor,
Can anyone help me, would like to use the card