A general rule of thumb for getting through tough dungeons that you can't solo, is to wait outside for a few minutes for someone else to walk up, then team up. Or, hop to a more popular realm and wait a minute or to.
As for asking for help on forum, be super specific please. Say what time specifically (and for what time zone), say which area, which realm and where to meet at. Happy playing! -Adam Seafist -Adam Dawnstalker