No idea about that sorry, but I saw your name and just wondered how it's going with you and DH. Last time I saw you was on your thread about wanting to chuck him out cos of his mess in the conservatory, and unfairness towards you.
Sorry, I know it sounds horribly nosy, just wondering how you're doing.
I hesitate to ask, but have you unplugged the lot, waited a couple of minutes then plugged them all back in again? It works with ours (sometimes). Alternatively, have you called your ISP/broadband provider? We use Virgin and they're often quite good at diagnosing problems.