Anyone else experiencing this?? getting logged out every 2-3 PVs

Is anyone else facing this??

I was offline for about a week and ever since I came back today I keep getting logged out after opening 2-3 threads... Could this be possibly because of my variable IPs.. I have to pass through an HTTP proxy with required authentication.. My college uses 2 ISPs and from what I know it randomly chooses anyone anytime.. So I appear to switch between the IPs(59.xx.xx.xx and 203.xx.xx.xx)

appreciate any help..

cheers,
Uchiha

The same problem here.
After 2/3 thread I'm logged out.
It's first time I'm experiencing this, I have always kept BHW cookies to be logged permanently.

Well whenever i come to the site (after some hours like - 4 or 5) I am logged out! Even if i didn't logged out.