OK, this is where it gets tricky. It sounds like you uninstalled Mandrake, but this does not uninstall Lilo. Depending on how you got rid of Mandrake.
The fixboot method did not work.
Assuming that your hard disk did not just decide to go bad in the process, try this.
Get the XP CD out again and try this fix;
"Boot the XP CD and choose to install, when you get to the page, choose R. You can then type fix /mbr This is supposed to rewrite the MBR and put NT's bootloader back in."
Borrowed from
here.If this does not work, then we will try to save your data on the XP drive/partition. You might want to consider repairing the XP installation, as I assume you want to save XP?