thank so much for answer.
Pen is fat16 and here is parted output:
Disk /dev/sdb: 4043MB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Number Start End Size Type File system Flags
1 32.3kB 4043MB 4043MB primary fat16 boot, lba
Do you think there is something wrong?
Pen is booting right on USB boot supported systems.
Os is windows 2008 server installation dvd, of course I don't even think to install it with this notebook! It is just the only usb bootable pen I have around to test plop functionality.
I really don't remember how it was formatted/created, it was some ago.
Valerio