New Accu not present?

Hi All,

A few days ago I'v replaced the accu from the MBP 15" (early 2011).

After I have removed the old accu and placed the new one, who I have orderd on this website. I try to booth, nothing happend.

The MB only booth when it's connected to the power adapter.

After the MB is started the battery Icon in the top screen shows a cross. I'v tried to fix this problem according the solutions from the official apple website (reset SMC, battery update etc etc.) but nothing works. Could some one please help me, and give me some advise?

Thank you in advance.