Problem with some POST data

[eluser]CroNiX[/eluser]
It doesn't work because of all of your single quotes within single quotes, like I pointed out earlier.
You are also using form_open() improperly. It automatically inserts the base url, so you probably have that showing up twice. You just tell it the segments.

Code:

form_open('users/mod_pers_data_act');

Although, that won't help where you are (again) improperly using single quotes, such as your submit input.