grid sorting don't work

first thanks for yout time and so preety work.

Hi i have a grid that don’t sort ( it print the triangle but dont work)

mygrid.load(<?php echo'"alfonso/todo_clieload.php"' ?>,"xml");
mygrid.init();

and alfonso/todo_clieload.php" here have a section of code, I put a clausule Sort in each

cliente

Agente’
.$tx_linea.’

Tipo
pot.
Real

replace
Sort=“int” >cliente
with
sort=“int” >cliente