You might need to port forward your device. You call it RCA, I do know some brands change (taken over) or are sold under other brand names under license at times. (I do remember seeing RCA listed at the following site but seems to have been removed, perhaps due to one of the above reasons.)

Here are the steps for port forwarding & must be in this order:
1. Static IP address on a Windows XP

2. Port Forwarding for the Thomson/Alcatel DCW725. Double-check this to be sure it looks the same & same log in.

Also check the security settings of the router. Sometimes they have strength of security which unnecessarily blocks games, etc. If it does have a high medium low, perhaps try lowering it a little.