Made the dvd that was all fine restart with dvd drive and it starts loading apple screen with the little circle for a bit then a circle witha line comes up over the apple symbol. dont know what to do or whats wrong can anyone help me?

PRocessor: AMD Phenom(tm) 9150e Quad-core processor 1.80 ghz
Installed Memory (RAM): 4.00 GB (3.87 GB usable)
System type: 64-bit operating system

idk if you need more information if so please tell me where to find it and ill post it.

edit : also just realized it sits at "Still waiting for root device"
ty in advanced -raf,