My search box doesn’t work

Hi.

I am building my first WordPress site at resinbarbarian.com. It’s going pretty good so far, and I have a friend who has helped me get over a few bumps. I’m trying to stop pestering him, though, because he’s very busy this week.

My problem is my search box, because it isn’t working. Search any term and I get a message reading “Error 404 – Not Found”. I have struggled through several issues today, but I don’t even know where to begin with this one.

I am using a unique theme that my friend built on the Blueprint theme. I’ve also made a few modifications of my own.

If anyone can even point me to the right place to look for info, I’d appreciate it.

Thanks.