Kernel-image-2.4.1-di booting problem....

[Gong Yi LIAO]

Hi ,gurus
I had apt-get install kernel-image-2.4.1-di several hour ago,
and I tried to boot the kernel from hda on my machine(x86)
,but I got trouble while the kernel mount root file system ,
the error:
VFS:error ,can not find root file system ,or:
I can not get root I want to scream
How should I do for booting the kernel image 2.4.1-di correctly ?
Thanx!!!