www.link-o-rama.com submit script broke?

I have been trying since yesterday to submit a link on this page:
http://www.link-o-rama.com/greenguy/email.shtml

I have a recip on the first page of the site I am submitting, and am following all the rules listed here:
http://www.link-o-rama.com/greenguy/therules.htm

When I fill out the form, it takes about 15 seconds (or more) and tells me there's the following errors:

 Error!
Your submission could not be accepted for the following reason(s):
A reciprocal link is required and no reciprocal link was found. 
Your Site's URL appears invalid, as it has returned the response "500 Unable To Connect".

My site is online and the recip is on the top of the first page. Can someone take a look at this?