plugin form submission

Hi guys,

I am writing a plugin and have the form laid out as I want it – my question is what should i be putting in my forms ‘action’ attribute in order to insert that forms data into my custom wp table? After inserting the data I want the user to be redirected back to the initial page on my plugin.

I have been able to get the form to enter the data into the table using
<form method="post" action="admin.php?page=submitform">

then using this

if (isset($_GET['page']) && $_GET['page'] == 'submitform') {
	do_submitform();
}

function submitform()...

but the problem is the browser redirects to the admin.php?page=submitform page and gives me the message –

you do not have sufficient permissions to access this page

maybe i need to enable this page somehow? how do i do that?

thanks for your time