[Solved] Prestashop 1.4 creating problem with jquery 1.4.4

[sam_jmit]

I have created a module for the payment gateway integration.It was working fine in 1.3. Now I have upgraded prestashopto 1.4. The jquery is not working fine displaying message 4 is not defined.
This is the head section of my page.

src="{$url}js/jquery/jquery-1.4.4.min.js">

This is the code for submission of form without clicking submit button.

[removed]
{literal}

$(document).ready(function() {
$j('#abc_form').submit();
});
{/literal}
[removed]

It displaying me a message $ is not defined. Really confused with the problem.