Question on peer to peer blocking

Hi, we have peer to peer blocking enabled on our Mikrotik system but have recently seen that there is one peer to peer program that our system does not block, called: DC++. Does anyone know of a way to block this program?

mikrotik is able to block DC and DC++ successfully, it has been tested. maybe your configuration is not correct ?

Ok, I suppose that is probably the case then but can you maybe please tell me how to set it up correctly in that case? Thanx.