Problems with Ajax library, submit to remote

[eluser]Rubiz'[/eluser]
Hi...

Whem I try to submit to remote I get this error message:

A PHP Error was encountered

Severity: Notice

Message: Undefined variable: options

Filename: libraries/Ajax.php

Line Number: 202


It means I cant submit to remote?
My call is like: $this->ajax->submit_to_remote("Inserir imagem", array('url' => '/html/add_top_image', 'update' => 'html_topo'))