Problem with multisite

Hi there!
There is a problem when using the plugin with multisite:
The code in your plugin that checks if the woocommerce plugin is activated works onli for single site, so on the multisite it exits with the following message: “Please Install and Activate Woocommerce Plugin.”

However I fixed this problem temporarily by modifying the “if” condition:

include_once( ABSPATH . 'wp-admin/includes/plugin.php' );

if ( !(is_plugin_active( 'woocommerce/woocommerce.php')) ) {
	exit("Please Install and Activate Woocommerce Plugin.");
}

Could you please release a new version with this minor fix?
Thank you ??