Writing Widget but remove_action not working

Hi,
I have a rss widget that I’m writing.
I want to give the user the option to customize the link color, background color etc by entering it in the widget options.

I dont want any inline css so this is how I tackled it.

In the constructor I do:

class CustomRSSFeedsAggregatorTicker extends WP_Widget{
			var $bgColor = "#FFFFFF";
                        var $linkColor = "#0000FF";
			var $descWordLimit = 15; //max number of words to allow in the description.
			var $maxRssEntries = 10; //max number of feeds to get from each rss URI.

			function CustomRSSFeedsAggregatorTicker(){
				$widget_ops = array('classname' => 'custom_rss_feeds', 'description' => __( "Custom RSS Feeds Aggregator Widget") );

				$this->WP_Widget('ticker', __('RSS Feeds Aggregator Ticker'), $widget_ops);

				add_action('wp_head', array(&$this,'addStyle'), 1);
				add_action('wp_footer', array(&$this,'addScript'), 1);

			}

In my addStyle function:

function addStyle(){
				$height = $this->height;
				$width = $this->width;

				echo '<link type="text/css" rel="stylesheet" href="' . get_bloginfo('wpurl') . '/wp-content/plugins/custom-rss-feeds-aggregator-ticker/css/rss-aggregator-ticker.php?version=1.0.1'
				. '&bgcolor=' . $this->bgColor
				. '&linkcolor=' .  $this->linkColor
				. '" />' . "\n";
			}

Then when the widget options are updated, in the update() method I update this variabled bgColor and linkColor:

$this->bgColor = $instance['bgcolor'];
$this->linkColor = $instance['linkcolor'];
remove_action('wp_head',array(&$this, 'addStyle'), 1);
add_action('wp_head', array(&$this,'addStyle'), 1);

The hope is that in the update method, i remove the old css include and replace it with a new one that include the new params…

only problem is that the remove doesn’t seem to happen, when I look at the page, I still see the old css include.

Can anyone help?