Have you tried connecting your rs232 shield to the rs232 on your PC. Then do a simple sketch to echo your arduino serial connection over rs232 to check that it's connected up properly. This is to make sure its all connected up properly
Please enter a valid email to subscribe
We need to confirm your email address.
To complete the subscription, please click the link in the
email we just sent you.
Thank you for subscribing!
via Egeo 16