The mods are the moderators. They make sure no one is breaking the site rules. You'll know whether your thread has been approved by going to the Check if Your RP Has Been Accepted thread in the Pokemon Roleplay Lounge.
If it's in the RP forum you didn't do anything wrong. The mods need to approve the thread first. After a while the mod Alter Ego will post in the thread Check to See if Your RP Has Been Approved. She'll tell you whether your thread was approved.