Hello. please help me

[athi]

I made a team of discussion. how can I send an invitation in somebody in order to it enters in and make him member?
he was member with his email adress. it changed electronic address and now he cannot enter again inside the chat.
the system says to him" "Connection Problem. You could try to start the chat again, Sorry"
please help
thank you

[DarkShadowLurker]

It's an internet problem...he should most likely just keep trying when he knows that his connection is good