pocampo

I have unloaded update "529R2", but I have not been able to realise the changes by the following errors: I have bought 2 tarjedas SD of 4 GB and load file EBoot_SJ.nb0 and KK_SJ.nb0, when following the instructions indicates error to me "can not find sn/mmc card".
I have placed the original SD and have load the EBoot_SJ.nb0 file, now does not indicate error to me, but the control says: NBoot: Not found, Eboot: Not found and " update process is failed."
How I can solve these problems?, which are tajetas SD that I must buy?, or only I must give the suitable format them. Please to explain.

Regard Patricio Ocampo