Users Cannot Register On My Site

OK, so I have run into many problems.

1. When my users try to register only as members (without a blog), they are not able to do so at all. Additionally, Assira ("pick the cats") spam prevention always tell them to repick the cats even if they were 100% right. I think this is more of a sympton of the registration problem though.

2. When my users try to sign up as a blog, the "register" page cannot be found. Truth be told, I can't find it either on my site. I wondering if I did something wrong when setting up WP and BP even though I thought I followed all of the instructions.

Here's my site: http://www.affiliatemarketingnicheprograms.com

Thanks for the help!

Ed Brancheau