> I just got mine working today. I had no response until I selected the controller tab and checked the use light gun radio button. Granted, I am using version .74 of mame due to using a hp thin client with an atom processor but I hope this points you in the right direction. After that it just started working perfectly. Just needed to configure the triggers in game.
The processing power of that device might be interfering with the polling of the gun. Also, I recommend trying a much newer version of MAME (say .110 onward - on a different machine), to see whether performance changes.
Scifi frauds. SF illuminates.
Culture General Contact Unit (Eccentric)