Why don't you make it a PUBLIC group? That would be the best I think because then the WHOLE forum can acces it and not just the ppl that you have granted acces.
Everyone, this is a problem with Yahoo groups generally - don't blame Soletk...the same thing happens with my groups. I can always access them and so can lots of people but there are always a few who can't get signed in or whatever. Try contacting Yahoo and asking them what's up and why you can't get in.