Help needed please, regarding ping issues

[Optimus Prime 7]

recently (this past week)

every time i get into the game, the yellow chain appears, sometimes it goes and sometimes i then get the "no message received message" also my ping sky rockets, i firstly thought it was my internet, however when i close the game down it works fine.

any ideas what you think it could be, because i am in two minds to get a new wifi card for my pc.

help would be greatly appreciated

thanks