Goemon's Great Adventure error

I have Project64 1.6 and it works phenominally well on every game I've tried. One major issue I've come across is specifically with the game GGA. It works fine up until a point where I am required to swim underwater. At that point, the area loads with garbled multicolored pixels. Is there something wrong with my graphics card or can this be resolved? My PC is brand new so I hope it isn't the card...ugh

Thanks

Here's some more info and what I've tried thusfar...

I run an NVIDIA GeForce 7300 LE

I changed Jabo's Direct 3D from 8.x to 6.x. This did not fix anything.
I tried turning off filtering and anti-aliasing. This also did nothing.
I decreased resolution...again no results.

How do I select wireframe mode? (Sorry if this is a dumb question) I don't see it in the options.

It worked. Thanks guys