High shcool is a tough sell. Parents are just not that into getting pictures from every game. Now set up at a tourney for 3-5th graders and you will do pretty good. I shoot tons of highschool stuff and end up with over 65 events throughout the school year, hand out hundreds of business cards, and other ways of reaching my intended audience. It hardly pays for itself, showing up on speculation that you hope will create sales is not going to work. Mom and dad are happy with the cell phone or video that they take, or that one other parent who spent the money on a decent camera and gives the pictures away.
One thing I noticed is your pictures are way too big on your website, even taking a screen shot, putting it into a new image in Photoshop and cropping out the rest of the page resulted in an image size of 898x602 pixels, or 12.472x8.361 @ 72ppi. Those make prints that parents are happy to steal, even the ones with copyright marks on them. Yes, they look nice in the larger size, but they are so easy to take for free. Keep them to smallish sizes and tougher to get a decent screen shot image of.
here's an example of one of them taken as a screen shot and then cropped down... lots of parents and kids would love printing this out, using it in a slide show or posting it to Facebook.