Section 508 Validation And Forms

I've got a site under development:

• XHTML Transitional is valid
• CSS is Valid
• All pages thus far except ONE passes Section 508 validation

The one page...the homepage, has a form and I get this message:

All INPUT elements are required to contain the alt attribute or use a LABEL.
* Failure - INPUT Element, of Type TEXT, found at Line: 128, Column: 19

Code:

My contribution: $

This same form is going to be used on another page. What do I do to make it pass section 508?

Here's the site under developmnt if you want to peek.