As the title says i'm using a dlink 504G modem. I have had it for over 4 years but the last few months it has become extremely unstable. I play computer games a lot where i can't have my net disconnecting. I'm wondering if this is caused due to age or not being able to handle the new speeds of broadband.

ALso.. on mondays (only mondays!) it disconnects when certain numbers are called and ring.

Any help is appreciated.