hey guys i just bought a "2gb Kingston ddr3 99U5595-002.A00LF" i plug it in my motherboard and my pc wont detect it.... i already have an existing "2gb Kingston ddr3 99U5474-012.A00LF" installed in my pc... my motherboard model is "P5G41T-M LX3"... pls help guys i really need to install this newly bought ram and i don't know how :C