can't get a gba game to work...

[disorderlyvision]

I have a gba cart for super monkey ball jr that will not load. i thoroughly cleaned the prongs with a q-tip and rubbing alcohol numerous times. still no luck. I heard that sometimes an eraser can shine them up better, so i took the cart apart and tried that. the board looks fine there is no noticeable damage that i can tell, and still no luck. any other suggestions?

[Hobie-wan]

Is it legit? Does it have Nintendo silk screened in white above the pins? Post a picture perhaps?