Obtruse_Man4

I just build this site, and I'm having some trouble with it. I put blogging software on my site, and I'm currently trying to turn it into more than just a site with a blog. As you can see I've managed to add links to the top bar. I'm not a programmer in the least, but I was able to figure out that bit of php. That link is the pics gallery I'm trying to setup. It's supposed to come up with flash, but doesn't work. I got the flash script from a friend, and by itself it works fine. Just change the .php file to a .html, and it will come up with the other page (without the header). I thought I had finally gotten the header working, but apparently it has some problems. I tried using Markup Validation Service, but the errors I get from there make no sense. I tried changing bits of the code at the top, but most of it doesn't make sense. Would appreciate some help, thanks!