edgy not booting into live

[MICHAEL WEAVER <michaelweaver1 btinternet com>]

I have tried to boot the desktop CD for Edgy to try it out only I can't 
get into the live Ubuntu to see how accessable it is.
I tried those keystrokes to disable the Splash screen but I still don't 
get sound.
I tried the F6, End key, left Arrow 4 times, Backspace 7 times, hit 
enter but it is still churning away.
The only thing I can think of is that I maybe pressing the wrong 
Backspace key.
Am I supposed to press the big key above enter or the bottom left key of 
the row of 6 that are separated by a space from the main keyboard and 
the numeric keypad?
I am trying Edgy on my desktop.