Instant email notification - admin notification - mail issue?

[firentire]

Hi guys,

I have an issue with "instant email notification" - not sending email to users when somebody post in the same thread. I check and enabled plugin in admincp, but still the same result.

It could be a mail problem (but how?), because i use to receive an email every time when i get a new member - not working anymore either.

Registration area is working fine - sending and receiving emails without any problem.

Somebody have an idea?

Thanks,
George