IM2 suddenly stops importing mail ...


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Have recently installed IncrediMail2 on a laptop and linked the latter up to my PC with a wireless router (finally!). When I first added my two Hotmail accounts to IM, the latter auto-configured them and, for a few days, everything was fine. Now, however, it either doesn't import any of the mail that I find waiting in IM on my main machine at all, or just the odd one or two at random.
Have tried deleting both accounts and re-entering them, have checked the passwords, have checked the firewall is recognising them, etc., etc. but have now run out of ideas.
Has anyone got any other ideas please?