Install trouble No hard disks found

[Leyba, Matt]

To begin, I believe I have followed the install instructions to the 
letter, but I could be wrong. I have used an OS9 startup disk and 
utility to create three partitions on one HD, the first is 5G and is 
unallocated, the second is 6G Standard, and the third is 6G Extended.  
I restart from the YD disk and can only get as far as selecting my 
keyboard, I am then told Partitioning Error, No Hard Disks Found. Where 
did I go wrong?

G4 733 QS
YD 2.3 from original disk

Thanks!

mateo