Problem Integrating Aweber With Delavo

[Masonova]

I've set up Aweber integration as I usually do but in testing the order process, I get the following error from aweber:


Notice:
Sorry, the email address is not a valid email address format. You must provide a valid email address in order to submit this form. Please push the "back" button on your web browser and try again.


The email address entered is correct but I think somehow it's being changed as it is passed along.

This is my aweber URL im using: http://clients.aweber.com/scripts/addlead.pl

And the other options:

unit=gloopmember
from=#{Customer.email}
name=#{Customer.name}
redirect=#{Sale.thankLink}
meta_redirect_onlist=#{Sale.thankLink}

Any ideas what the problem might be?

Regards,
David