help with PB1400 HD?



I recently purchased a 30gb internal HD for my powerbook 1400. I have a g3/250 card in it with 64mb ram if that has any significance, but my dilemma is that I cannot get the hard drive to show up on the computer. I have booted off the CD and checked drive setup but it simply is not reading it. I had a 20gb but lost it due to kernel panic. Is 20gb the maximum size for a 1400 or am I doing something wrong?
can anyone help me? =/

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