submit button gone in IE8

Not sure what the problem is. Missing tag somewhere? How do I locate the files with the code for GF? I'm not a programmer (have limited programming background). Perhaps run through
http://validator.w3.org ? But again , not sure where the files are?

sorry:
http://www.renttoownhotlist.com/ Again this is in IE8.

I noticed it's just on the first page. The following pages have
the submit button and is working.

Update:
I ran it thru adobe brower test and the submit button
is to the far right of the screen.

I tried in in a windows xp machine running IE 8 and also tested it at
browserlab.adobe.com and I'm coming with the same. The submit button
is to the far right.

See screenshot: http://renttoownhotlist.com/tmpform.png

What if you replace this selector's styles with the following:

[css]
.custom #gform_wrapper_7 #gform_7 .gform_footer.top_label {
float: right;
margin: -120px 100px 0 0;
}

Then update your height declaration on .custom #gform_wrapper_7 #gform_7 .gform_body to be 364px instead of 400px.

You could do this whole thing in alternate way as well. Instead of applying the background to .custom #gform_wrapper_7 #gform_7 .gform_body you could apply it to .custom #gform_wrapper_7

This will allow for the submit button's distance from the form to be more natural. Right now you have the body set to be a height of 400px, which means the submit button (gform_footer) starts after the 400px height.