Validation doesn't work

Hi,
i've created a new form, i've added all the required fields, but when i try tu submit this new form the validation is not working.
I've enabled the uploads too and i've added this -> file_6:doc|pdf|docx{2000-1}
and this validation doesn't work either.
What can I do? I've enabled all validations and it doesn't work :?

Thanks!!!

Hi cfeliu,

Please post a link to the form.

Bob