i had a similar problem, and on some maps i couldnt join but the next day i could play on that map.. turns out it was a KEY issue with mount and blade warband and taleworld itself, not the mod,
point being, i had to write down my key, uninstall COMPLETELY, re-install, re-install crpg, re-install all my texture and sound mods for crpg. then put my key back in, then everything has been good
that was about 4 or 5 months ago that i did that..
Now, i dont know if thats the same issue that you are having, so i wouldnt go ahead and just uninstall everything just yet, i googled and searched taleworlds forums for a few hours till i found out all i needed to do.
or maybe its just a RAM problem, i dont fuckin know,
im a pothead.