Plugin variables question

Hey again WP forums!

Been scratching my head for a while now, and I bet someone here could cure my of my headache with ease.

I’ve made a plugin of my own, which is working as it should. However I wanted to add an option window for my plugin, and since this plugin is intended to be placed inside a widget I wanted to have my options right there in the widgets tab of WP. And since I didn’t want to clump up to much customization inside the little box where you drag your widget I decided a nice solution would be to have a options button that opens a modal-popup, where I would’ve all the option customization space I ever wanted.

For the modal I tried with Lightbox and more recently Fancybox, they both work great for drawing the modal, but when it comes to handling the php variables from my plugin I’m stumped.
The modal opens in a inline div, which is placed in my admin.php (the file controls what the widget when in the WP control panel will show).
Inside the widget itself (not the modal) I simply use
<?php echo $instance['my_variabel']; ?>
This echos out the selected variable, $instance is an array containing all the variables, and is used for updating the variabel when they are saved.

When I try the same code inside the modal it echos out nothing, a var_dump on $instance shows the array, but all the values are empty. It is as it loads the modal with this php-code before their values have been set by my plugin.

Inside my plugin I use a function to generate the admin form with all the keys and their values, these are all set to ”, if I change the value from ” to anything else, that will show up when I echo it on my modal, but not the updated value.
Here’s the code for clearification:

function form($instance) {

		$instance = wp_parse_args(
			(array)$instance,
			array(
				'my_variabel' => '',
			)
		);
    $my_variabel = strip_tags(stripslashes($new_instance['my_variabel']));

    include(WP_PLUGIN_DIR . '/' . PLUGIN_SLUG . '/views/admin.php');
}

How can I bypass this? I initializes fancybox on the element with:

jQuery(document).ready(function($) {
	$("a#inline").fancybox();
});

this snippet is from my plugins .js file that is used when the user is admin, it’s called admin.js and is enqueued after I set the values of my $instance variables in my plugin.
I also tried initializing fancybox on my element in admin.php, which loads in my plugin once again after I’ve set all values.

Would appriciate any help here, been slamming my head against the desk all morning over this. I hope I made my problem clear, I’m very bad at explaining things, specially in another language then my own. If anyone needs something cleared up, just ask.

Best Regards