Validation problem, maybe server problem

[eluser]Référencement Google[/eluser]
Hi,

I get a problem with a simple form to validate.
In local it's perfectly working, but once on the prod server, impossible to make it work.

In my view form i have things like:

Code:

<?=$this->validation->prenom_error?>

And once on the production server, i get errors like :

Code:

A PHP Error was encountered

Severity: Notice

Message: Undefined property: prenom_error

Filename: contact_form/contact_form.php

Line Number: 8

Can somebody help me ?