Problems with PHP sessions?

[ZX_SA]

It seems like I'm having problems with PHP sessions. For example, there are quite a few phpbb2 forums that I just can't use because I can't stay logged in. After a lot of trouble messing around with my own website, it seems that the first link I open is done from my IP, the next from a SAIX cache IP, then one from me again etc etc etc.

What's up? Should this happen? Anything I can do?

Any ideas will be appreciated! This thing is really starting to annoy me

 

[fergus]

Can you give an example of one of the forums you're talking about so I can check it out?

 

[ZX_SA]

www.phpbb.com's community forum is one
www.phototakers.com/forum is also having some problems although it's not a phpbb