[eluser]@li[/eluser]
Hey man,
This might not be causing this but try replacing
Code:
<?=$this->uri->uri_string()?>
with direct URL to the script e.g
Code:
<?=form_open('your/site/admin/page');?>
Also you did mention that this was working on a different server, right? There might be something in your server configuration which causes 'curl' based submissions to fuck up. We can look into that if this doesn't work.