6.2 hangs probing floppy

[Vittorio]

I updated my pentium 3 PC Compaq Desktop 450 from freebsd 5.3 (which 
was working like a charme indeed!) to the new 6.2 installing from a CD.

It happens that the boot 
1) runs smoothly as usual till after the 
probing of the CDs, 
2) then the boot hangs for about 3 minutes probing 
the floppy (I see the floppy led turned on for the same time), 
3) 
eventually again smoothly till the end of the booting process.

 I 
noticed that the /dev/fd0 device is not found and there's no way to 
mount it.

What shall I do?

Vittorio