Shopping Cart Plugins

Hello Everyone,

I’m having this weird issue, and it only seems to happen with shopping cart type of plugins. When ever I try to active an shopping cart plugin I get this type of error.

session_start() [function.session-start]: Cannot send session cache limiter – headers already sent (output started at /home/content/p/o/w/powerblaster/html/wp-content/plugins/simple-cart-buy-now/includes/functions.php:6) in /home/content/p/o/w/powerblaster/html/wp-content/plugins/simple-cart-buy-now/includes/functions.php on line 6

Does anyone else have this problem? Does this happen because of something on my server? Can I update my host file to fix this, or is the code in the plugins messed up or not compatible with the new WordPress now? I know for a fact I was able to use the plugin “WordPress Simple Paypal Shopping Cart” before.

Any ideas on how to fix this issue?
Thanks Everyone,
-Joe