Remove space at the bottom of a form

Hello support,

I'm tryint to remove the space at the bottom of the following form:

http://www.jotform.com//?formID=50077643649967#

I have it embedded as an iframe and I have tried what you suggest here:

http://www.jotform.com/answers/36933-How-to-remove-extra-space-in-my-form

To no success. Could you please help me?

Thanks,

Pablo