Web to lead form not capturing data

Web to lead form not capturing data

We have a web-to-lead form that is not capturing data in the CRM.

We have verified that the "manual approval" box is unchecked.

We have created a test html page with absolutely nothing on the page except for the web-to-lead form.  We can fill out the form, submit it, and get redirected back to the right page, but the new data does not make it into our CRM.

Please help.