Page 1 of Problem using original snes controller with mac using snes9x

Hi - I bought a usb connector for my original snes controllers to use with Snes9x on my 2010 mac mini.  It works perfectly with Zsnes emulator but that emulator crashes when you try and put it into full screen.  However, I can`t configure the direction pad properly in the configure controller setting.  It allows me to map all the buttons correctly but when I press up on the direction pad it maps it to both up and down.  Similarly when I press left on the joypad it maps it to both left and right.  When I start Streetfighter 2 my character is in a default crouched postition and I can only move him in one direction. 
I have tried 3 different snes controllers and the fact it works perfectly with zsnes tells me the controller isn`t the issue.  I have googled it and can`t find a solution.

Any help or advice greatly appreciated.

Best wishes

Dan

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