I use photoshop to draw, but lately my strokes are all showing up transparent, even when the opacity is set at 100%.

I'm photoshop illiterate so I have no idea what is wrong..I have been toying with all the brush options and none seem to affect this.

This is what I mean:

http://tinypic.com/r/2jxxd3/4

The strokes are see-through and overlap.

Anyone know the problem?

No...I double checked those things but everything is set to normal... :(