submit form not working suddenly

I was revising my templates tonight and suddenly the submit form stopped working. Specifically it freezes when I press it. The dotted border appears, but it jams there. I turned off field checking, but that had no effect.

I made one mistake and removed the name and email fields from by booking form. That stopped the form from showing. Then I tried it with the fields, but hidden. That seemed to work then stopped. But showing the fields did not fix it.

An example of the form can be found at:
https://chocochoco.byethost4.com/wp/events/12/531-family-english-copy-copy/

my template is:
<br />
<h1> Current Family Information</h1>
<p>Please edit this if necessary.</p>

[PM_Profile] (this is the shortcode for profile grid plugin
<br />
<h1>Register for the event</h1>

<span style=”display:none;” > #_NAME, #_EMAIL</span>
</tr>
<tr>
<table class=”eme-rsvp-form alignleft”>
<tbody>
<tr>
<th style=”text-align: center;” colspan=”2″ scope=”row”>
<h2>Children Attending</h2>
</th>
</tr>
<tr>
<th style=”text-align: right;” scope=”row”>How many? *</th>
<td>#_SEATS{1}</td>
</tr>
<tr>
<td style=”text-align: center;” colspan=”2″ scope=”row”>For more than 1 child, there is a 500 JPY?discount. Please select 1 here if you wish the discount: #_SEATS{2}</td>
</tr>
<tr>
<th style=”text-align: right;” scope=”row”>Please leave any comments or questions you have here.</th>
<td>#_COMMENT</td>
</tr>
<tr>
<th style=”text-align: center;” colspan=”2″ scope=”row”>
<h2>Submit Form</h2>
</th>
</tr>
<tr>
<td style=”text-align: center;” colspan=”2″ scope=”row”>Fill in the following Captcha
#_CAPTCHA</td>
</tr>
<tr>
<th style=”text-align: center;” colspan=”2″ scope=”row”>#_SUBMIT</th>
</tr>
</tbody>
</table>