Hi guys! I'm new here and need some help...

I had a successful installation and now after reboot i got stuck in the grey screen where the apple logo appears.
When I take the options "-v busratio=20" i get still waiting for root device.
Thank you for your help, sorry for my english (I'm german)
Sammy

My system:
Fatality FP-IN9 SLI - Mainboard
Nvidia Geforce 8800GT - Graphic
8GB Ram OCZ
Intel Core2Quad Q6600 CPU (x64)