Problem installing 8.10

[Guest]

Hello,
I downloaded Kubuntu 8.10 Desktop and i loaded it.
When i choose ''Try Kubuntu without install'' or ''Install Kubuntu'' my screen say: Switch to 1680x1050. When i reboot my screen it says by the resolution: W 16.8KHz and V 12.1Hz what must i do to fix this? Is this mean that the driver for my graphics-card is not good?
This is my PC:
Mainboard: ASUS P5K/EPU
CPU: Intel Core 2 Duo E7200
Memory: 2 GB kingston 800MHZ
Graphics: Sapphire ATI Radeon HD 3850 (1x)
Network: Sweex RT2500 wireless

[cantab]

Re: Problem installing 8.10

You could try krandrtray