[Plugin: WP Super Cache] Unable to uninstall Super Cache

I tried to uninstall [i]WP Super Cache [/i]and got the following error:

Warning: session_start() [function.session-start]: Cannot send session cache limiter – headers already sent (output started at /home2/ericpeop/public_html/epicimagesonline/wp-content/plugins/wp-super-cache/uninstall.php:6) in /home2/ericpeop/public_html/epicimagesonline/wp-content/plugins/wp-cart-for-digital-products/wp_eStore1.php on line 2

I’d just like to properly and neatly uninstall this plug-in. What should I do?

-ep