weired teleportation to my dimension

when i go in my portal block it teleports me back and forth between the dimension and a ocean none stop

the code thats causing it is this

public void onEntityCollidedWithBlock(World par1World, int par2, int par3, int par4, Entity par5Entity)
 {
  if (par5Entity.ridingEntity == null && par5Entity.riddenByEntity == null)
  {
   if (par5Entity instanceof EntityPlayerMP)
   {
    EntityPlayerMP thePlayer = (EntityPlayerMP) par5Entity;
    if (par5Entity.dimension != mod_MainClass.DimensionID)
    {
     thePlayer.mcServer.getConfigurationManager().transferPlayerToDimension(thePlayer, mod_MainClass.DimensionID, new ArcticTeleporter(thePlayer.mcServer.worldServerForDimension(mod_MainClass.DimensionID)));
    }
    else
    {
     thePlayer.mcServer.getConfigurationManager().transferPlayerToDimension(thePlayer, 0, new ArcticTeleporter(thePlayer.mcServer.worldServerForDimension(0)));
    }
   }
  }
 }

but the problem i everything after else i get rid of it it stops it and i can get to the dimension but not back

please help