Don't just give up on it! 
At least tell your mum or whoever set up the network that you want to forward ports 10052-10054 to the computer you play JJ2 on. Maybe even show her this post and my reply above.
And you didn't answer any of my questions. You've got to know the answers to some of them (like at least you should know what kind of internet connection you have and if you have a router). I'm just trying to help with it, but I can't if you don't answer my questions, nor ask someone if they know the answers :/
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With our extreme gelatinous apology,
We beg to inform your Imperial Majesty,
Unto whom be dominion and power and glory,
There still remains that strange precipitate
Which has the quality to resist
Our oldest and most trusted catalyst.
It is a substance we cannot cremate
By temperatures known to our Laboratory.
~ E.J. Pratt
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