Whenever i download a certain map for soldat for example ctf_skillz, it always says "wrong map version detected". I tried reinstalling the map by downloading it again, but it did not work. Please help me solve this problem.

Common problem its just there is a bug in the map and disable others to download... I think this is an unpreventable problem >< not sure

Well, the problem seems rather self explanitory, obviously the map that the server's using is different to the one you download. You should try emailing the server admin's and ask them for the map personally.

It happens to me sometimes, even when i have the map. I just rejoin the game. That normally works for me.
I don't see any need to leave the game to redownload the map.
You may have some other problem though. Try rejoinin to see if it works.

I go on google and search for the map. IF you find it go into your Soldat folder and into maps and put it there. If you can't find it you just have to wait, because once the map changes you can get back in. If the map is voted or automatically goes to the map you don't have you should be able to stay in the game.