Lost Connection..????

Guys Need Help Every time i join a match after playing 4 - 5 minutes connection lost..??
i Played 7 - 8 Games & not Complete any of theme every time connection lost WTF.. ANY SoLUTION.??

i am playing in NA
Game Mode - full screen mode
Pr - i5
Graphics Card - Nvidia Geforce 650 Ti
Ram - 8 GB
HDD - 500 Gb
Internet 4 MB DSL

any 0ne.??

Your net probably?