utcwebdesign on "[Plugin: WooCommerce - excelling eCommerce] Woocommerce Cardsave plugin"

Hey everybody, if you're familiar with the Cardsave extension, you might be able to help me out.

I am using Woocommerce with the Cardsave extension to take payments.

I have the plugin installed etc. (I havent upgraded to 2.0 BTW) But when I get to the redirect part I get an error -
"This transaction cannot be processed. The submitted data was rejected for a SECURITY reason: HashDigest does not match."

I think I have everything filled in in the WP part as I need. Could I have missed something in the Cardsave MMS?

ANY ideas greatly appreciated

Thanks

http://wordpress.org/extend/plugins/woocommerce/