internet sent bytes and received byte problems during gaming

Hi guys,
I have some problem with internet sent bytes and received bytes.
While I surf the internet sent bytes are less than received bytes, but
while I play game sent bytes are increasing more than received bytes.
I didn't happen since yesterday. I don't know what happened.
Seems that this is causing me lag during gaming.

plz help out to find a solution.
I have already checked virus through scanning but nothing was affected.

What game were you playing when you noticed this phenomenon?

well I play game called Sudden Attack North America
It is a FPS game.

The game is sending position data, status data, joystick commands: hundreds of bytes of information is being processed and sent to that game's servers. The most common chokepoint of data transmission from a PC are TCP reception and acknowledgement, low bus speeds, hard disk write and read speed limits, and operating system-based interrupts.

You can address HDD speed limits with a defrag (force it). See what the "Advanced Tools" section of your Control Panet's "Performance Information and Tools" application has to say about any processes that are causing Windows to take too long to do anything. TCP reception and acknowledgement issues can most quickly be addressed by disabling your firewall software when playing the game.

"Resource Monitor" is the most direct way to "see" what applications are using your Network connection; they're going to be svchost.exe apps, probably, demanding the top ten or top five bandwidth spots but the cool thing about Resource Monitor is you see what kind of program is running these demands: localservice apps, your base system, and whatnot.

thank you for the help Paulie
I used the resource monitor and see what programs are using
the network and I found out PMB.exe or similar to this were running
and when I got rid of it no more lags at all.
Thank you for the support again
it has been very helpful.