hello,

An error occurred When I add new product  or edit a product in Management control panel,

And Use the "<span>Tell a Friend" function  occurr the same error.</span>

following is the error detail info:

We're sorry, an internal error occurred that prevents the request to complete.

Our supporting staff has been notified with this error and will address this issue shortly. We profusely apologize for the inconvenience and for any damage this may cause. You might want to try the same action at later time.

thank you

It's probably you didn't get up your smtp settings right. Check your web.config and search for "mailSettings". Make sure you have permission to send email under the account that the web application pool is running.

Forget to mention. Check your web server eventlog and you should see the detail exception stack.