URGENT .. EROR SEARCH ON CODE IGNITER on hosting but on localhost "OK" please give solution

[eluser]dunia program[/eluser]
codeigniter in localhost is running normal, but after upload on hosting have problem on search product " can't read varable "q" , is simple problem but i don't know to fix the problem.

for author or all please cek in URL http://akindacargo.com/latansa/
user: akinda
pass : latansa

insert "keyword" and press "cari" or search cause i'am indonesia people
eror with URL NOT FOUND .. note : in localhost "OK"
please give solution .. thanks for all before ..

for php info in http://akindacargo.com/latansa/info.php

thanks

me
dunia program