You probably had v1.20. You can play online there, too. But that version has some bugs, and because of it, I am pretty sure there aren't much players who plays it online (maybe 2-3 per week). It is fixed in 1.23 and 1.24 (TSF - The Secret Files). More bugs were fixed with Plus. So if you wanna play online, the best solution for you is: Play with plus, whichever version of JJ2 supports it.
You could use jjnxt for the next levels until you are in FM, but I think I sent you PM with that file.
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