Upgrade Ram problems Macbook Pro A1297, 3.06 Ghz

Hello,

I just trying to upgrade my 4 gb 2x2 ddr3 ram to 2x2 8 gb dd3 ram, with all possible variants of dedicated ram for Apple, 1067 Mhz, 1.5 V, 3 different producers, recommend by Apple on this model and no result, the error sound is continuously on and no boot. In technical description this model say that i can upgrade to max. 8 gb ram and truth is that is not possible. Why? I think that Apple customers deserve an answer from the company.