If you have not received your Welcome email, please ensure that you have no Spam filters in place that could possibly mark our emails as junk.
You can also login to the client area via http://www.ucartz.com/clients/clientarea.php and click "Hello, YOURNAME" in the top of the right side, then click "Email History" to check all the emails which have been sent by our system to your email.
We can resend the email if needed, please drop us an email to info@ucartz.com.