Check your CMOS battery. (Take it out, test it with a volt meter, put it back.)
Check the settings in the BIOS for the floppy drive type.
Should be a 3.5 inch 1.44 MB drive.
And look at your Floppies.
Are thy all the same type? Cant you format an old floppy?
You may be trying to use floppies that are for a MAC, not a PC.
Or, the floppy drive may have just gone bad.