Well I've checked everything I can think of here, still no luck. I can't see anything blocking it.  . I've found that if I use a link to a forum topic from my email it goes into the forums ok but none of the other parts of the site work. 

It seems to try and load but very slowly , about 5K a second , gets so far then just stops.I notice the activity on my connection stops.  I'm wondering if theres a dodgey  connection somewhere that may be just affecting a certain area. Strange that its only affecting that one site though.