[Plugin: Visual Form Builder] Error Timing out on Submission.

We are getting a Timed out error on our Membership signup form. You have to fill out the form 3 times before it will submit.

http://bikerdown.org/membership/registration/ I have deactivated and reactivated and it is still erroring out.

I really need resolution asap, our Website is being released at a tradeshow tomorrow and this is the first we heard of this error. So please can you advise us what is happening?

http://wordpress.org/extend/plugins/visual-form-builder/