Not
really enough information to go on, but ...
If you were trying to start a new adult game, then you would have had to go through the age verification process to get yourself registered with the new system. This functionality was announced a while back
link to a message in this forum and introduced in Update 67
link to a message in this forum.
The messages should have been self-explanatory and if there were any problems they would have told you what was wrong and to rMail the site moderators to sort it out.
If it wasn't an adult game that you were starting up, then we
definitely need more information to be able to help you - eg what message you're getting, what you clicked on at the time (so jase knows where in the code to start looking), platform (eg Windows version), browser (IE version, Firefox version), etc ... again, send the site moderators all the details in an rMail and we'll be happy to help and get you up and running.
Cheers ;>
Skald