WP Ecommerce Plugin

I have tried everything to get the WP ecommerce plugin to work with no success!

I’ve seen all the related issues and yes, I have installed the right folder in the right place. These are the errors that show on my screen ALL the time:

Warning: session_start() [function.session-start]: open(/home/users/web/b1171/ipw.pdla/public_html/poder/cgi-bin/tmp/sess_0c813a46072cdf31cfe0f8efb6bfcb53, O_RDWR) failed: No such file or directory (2) in /hermes/bosweb/web117/b1171/ipw.pdla/public_html/poder/blog/wp-content/plugins/wp-shopping-cart/wp-shopping-cart.php on line 165

Warning: session_start() [function.session-start]: Cannot send session cookie – headers already sent by (output started at /hermes/bosweb/web117/b1171/ipw.pdla/public_html/poder/blog/wp-content/plugins/wp-shopping-cart/wp-shopping-cart.php:165) in /hermes/bosweb/web117/b1171/ipw.pdla/public_html/poder/blog/wp-content/plugins/wp-shopping-cart/wp-shopping-cart.php on line 165

Warning: session_start() [function.session-start]: Cannot send session cache limiter – headers already sent (output started at /hermes/bosweb/web117/b1171/ipw.pdla/public_html/poder/blog/wp-content/plugins/wp-shopping-cart/wp-shopping-cart.php:165) in /hermes/bosweb/web117/b1171/ipw.pdla/public_html/poder/blog/wp-content/plugins/wp-shopping-cart/wp-shopping-cart.php on line 165

Warning: Cannot modify header information – headers already sent by (output started at /hermes/bosweb/web117/b1171/ipw.pdla/public_html/poder/blog/wp-content/plugins/wp-shopping-cart/wp-shopping-cart.php:165) in /hermes/bosweb/web117/b1171/ipw.pdla/public_html/poder/blog/wp-includes/pluggable.php on line 850

Warning: Unknown(): open(/home/users/web/b1171/ipw.pdla/public_html/poder/cgi-bin/tmp/sess_0c813a46072cdf31cfe0f8efb6bfcb53, O_RDWR) failed: No such file or directory (2) in Unknown on line 0

Warning: Unknown(): Failed to write session data (files). Please verify that the current setting of session.save_path is correct (/home/users/web/b1171/ipw.pdla/public_html/poder/cgi-bin/tmp) in Unknown on line 0

HELP PLEASE!!!