Forums mIRC Help Join and server connect not working

Try to update your mIRC version to the latest (7.36) from www.mirc.com/get.html

also if you are using any remote,dll,alias,coms use /remote off and try again to use /join #channel or /server irc.server

NOTE: 6.21 created on 2006 there are too many changes made on 7.36 that will probably fix you problem.