how to make pptp connection work on netgear mr814 wireless router

[eksantrik]

I have a netgear mr814 v3 wireless router in my home. My problem is that when I use pptp to connect back to the office, I can only keep my pptp connection for only 4 minutes.After 4 minutes I always lose my vpn connection back to the office .
(Either with wireless or hotwired to the router)

I tried to reduce my mtu size to 1436, then I tried to upgrade my firmware (which is v5 now) Non of them worked.

Does anyone have an idea?


thanks in advance