kamranidazi

I have a problem in posting my messages. I submitted my last message 4 days ago. Since then, I am not able to post anything. I just receive a message on and on, saying "you have used too many links recently, try an hour later". Second problem: Here we are working in a coffee-net. when I and few of my friends are working at the same time in different topics in reddit, just one person can proceed with it' the others are blocked. Is this natural?