question about sound in games???

I have KOF'99 and I really have to press it down into my AES in order for the sound to work, what is wrong with it?

Have you cleaned the cart and socket connections.

<a href="http://www.neo-geo.com/cgi-local/ultimatebb.cgi?ubb=get_topic&f=5&t=003001" target="_blank">http://www.neo-geo.com/cgi-local/ultimatebb.cgi?ubb=get_topic&f=5&t=003001</a>

Thanks I cleaned it, and it is now working good. I guess now is back up to a better price.