Although we are operating by whitelist currently, if you were able to get in-game and select a character, then that doesn't seem to be the root of your issue.
I recommend trying to connect to the server with another fresh install with absolutely no addons except for the SAMP client. If you are able to connect without issues, then the problem is one of your mods. If you still have issues, then the problem is obviously deeper and I can try to help you solve it.
Same with mine, mine isn't working still
The first question is have you logged into the UCP since RCRP has begun operating on a whitelist due to DDoS attacks? If not, log into the UCP, let it sit for a few minutes, and then attempt to connect to the server.