Old Hori 2-way pad stopped working

Hi all

Only stumbled on this forum recently; what a great resource!

Anyway I’m hoping someone can offer advice on how to fix my old Hori 2-way Fighting Commander.

Pic here…
http://i8.photobucket.com/albums/a15/af135/HORI_FC.jpg

I dusted this off when I got SFIV last month. I use it via a USB-PS2 controller converter, and all was well till today. The only thing I did different was mashing the buttons whilst on the phone (whilst it was still at the UMB screen) and now it’s completely dead!

I tried it back in the PS2 and it’s definitely dead. I’ve tried it in all 4 PS3 USBs but no joy

Any ideas? It’s too good a pad to discard…

Thanks