USB booting :: Can't boot from USB

I can't get my computer to boot from my Pendrive.
I checked all options that are described in this here forum:
-I don't use fast boot
-My USB stick is connected directly in the back of the computer

My BIOS shows the following options (besides ofcourse floppy and cdrom)

-ARMD-ZIP
-SCSI

I've tried both, no luck.

I've also tried booting with the floppy. I then get a message that the dsl data can't be found.

What should I do?

PS.

I tried with both USB-ZIP and USB-HDD install on my USB stick

Are there any other USB options in your bios? e.g usb keyboard support ?
Does the bios say anything about detecting a USB-mass-storage device when booting? Does the pendrive light blink?
Are there any sub-options from the HD-boot menu?
If you have exhausted all USB options in your bios, I'm afraid your
motherboard may not be able to boot from USB.
The floppy-boot is usually quite reliable, did you try the USB-boot-floppy instead of the Standard-boot-floppy?

Nop, I didn't try with the USB booth floppy. Where can I get that?

Apps>tools>Make Boot Floppy > USB BootFloppy

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