Displayadminproductsextra Form Submit Not Working

[goncalod]

Hi,

 

I'm developing a module that sends product details to a invoice solution via WebService.

 

I'm using the 'DisplayAdminProductsExtra' hook that generates a new tab in product.

 

It's all working 100% good in my localhost prestashop v 1.6.1.3, but when i install the module in a older prestashop 1.6.0.9 that form does not submit, it loads back to product list with no errors

 

In that presta 1.6.0.9 all works good excepts for that form in displayAdminProductsExtra hook.

 

Installation ok;
Configuration form ok;

New tab in products ok;

All variables ok in smarty template;

 

But when i click the submit button it goes back to product list with no errors.

I changed the action="" on my form to a file that doesn't exists, to force an error like <form action="test.php" method="post"> and the same thing happens, it loads back to product list with no errors, so the submit is not working in the first place.

 

Any help here?

 

I can paste my code here, but it does work well on presta 1.6.1.3.