Starting a BB Group, need help

I have looked and looked, can't find answer - sure it's there, I just can't find!

OK, this group is co-workers, and we are scattered in 4 states. I set the group up, but when I send the invites it goes as a PIN or email. I even sent one to my other bb as well. There seems to be no way to "Accept" the invite.

The email I got looks like this -

Hi,

I would like to invite you to join my group called "Deep South".

This invitation is intended for "[email protected]". (shows the true email tho)

If your device does not have the BlackBerry Messenger� application, you can download it from here: (bb download link removed due to me not having 10 posts!)
bbg:ARJEZWVwIFNvdXRofm5ob3RlM1oHG0Rvbid0IHZpb2xhdG UgdGhlIGR1bWIgcnVsZQIEIYk8XAgO
SmF5IFN0ZW1icmlkZ2UDCGkTh4W8Dv0tBQIiFQYIAAABKG3wvu YKAgADCwEA;


How in the heck would you accept that? No "accept" "yes/no" options etc...

Sadly, I am the "techie" in my group, and even I can't figure it out lol

Now, my personal bb is a 9700, but everyone in the group has the older work BB's with msgr 4.3 as the best it can get. Could this be the problem, or is there another culprit?

Many thanks in advance - and this may be a stupid question, but it wont be the only one I have during the course of my day :)

groups only works in bbm 5 as far as I know. I had the older version and couldnt do groups until i upgraded it