Mame4all multiplayer control question

Hi,

I got a newbie question, I was wondering if it was possible to play multiplayer at game that were originally multiplayer at the arcade (TMNT, Captain Commando, etc..)on the dreamcast preview version of Mame4all....

I connect two controllers on my dreamcast but only the start button of my first controller is working. But the input coin and pause option are working on the second controller. What is the player 2 start button?

Thanks a lot.

Use alpha-1 release, 4 players supported without problems.