I was trying to get effects level, but when i use: 
  
 
if (par3EntityPlayer.isPotionActive(Potion.moveSpeed.id))
	{
		int i = (par3EntityPlayer.getActivePotionEffect(Potion.moveSpeed.id).getAmplifier());
		wantedVelocity += (1 + i) * (0.35);
	}
 
  
it crashes my game. Eclipse says:'The method getActivePotionEffect(Potion) in the type EntityLivingBase is not applicable for the arguments (int)'. 
  
crash-2014-08-13_16.29.54-server.txt 
  
  
crash-2014-08-13_16.29.55-client.txt 
  
  
Thanks for at least looking at my post