Hello i have a problem i wanted to port forward my Minecraft server on mirkotik RB941-2nD-TC and i cant get it working. I dont understand port forwording much. So please could somebody explain me and send me detailed pictures još to do it my internal ip address Is:192.168.88.146 and i know that Minecraft servers use 25565 port. Thanks ahead.

This should do.
ether1 is your outside net.

Ohh man, minecraft. I do remember when i was playing it day and night. Now i look at my little brother and i see myself when i was in his age. I do remember though, that sometimes i was also having some problems with the server connection, but i do not really remember if it was exactly like in your case. This game actually, with that connection problem, made me start and get interested in progamming. I took a ccnp course and later i got hired for a web hosting company. In case anyone is interested in what a web hosting company is doing, you can learn more here. I mean it is a really great thing to know, and it is really interesting working in this domain.