Qns on Wireless netwk connection

I'm not sure if this qns has been asked and answered b4
but anyway, its driving me nuts, i wish someone could
help me here.

I'm using a D-link 714p+ wireless router along with my D-
link 520+ in my PC.
Primarily, in recent days, my pc is used to download
music n videos thru BitTorrents.
Initially there weren't anything wrong with d connection,
but in recent days connection keeps gettin cut.
As often as 15mins in every hr, it cuts itself off, and
i'll have to go reset my router.
Darn it, i cant complete any of my Downloads.

What is it that i'm doing wrong? or should there have
been something that i should do?

Could someone, anyone help?
thx a million.

Best regards,