Satelite a55 getting into the cmos?

I got a satelite a55 s1065 and I need to change
the boot order so I can use the restote cd.  the
cmos has a passwof which I know, but as soon
as I type it in, it starts booting to the internal hd.
I have tried f1 f2 del and other combinations but
I still haven't been able to get into the cmos.
any ideas?

thanks,
charles