Forums mIRC Help stupid needs help

thanks. managed to get onto tmd at last but having more problems(see my new posting STUPID NEEDS MORE HELP).
when i get onto tmd channel i get a whole load of words figures etc and when i typed in "how do i download" reply was type in a trigger. what is a trigger and how do i know what to type in?? will this trigger redirect me to tmd site?? thanks again for being so helpful.