Finally I have resolve the problem by miself.
Solution:
I went to the link that Rob1n gave me. I downloaded the firmware vanilla eMMC or something like that. Reflash with reflasher, and now the nokia is better than in the beguining.
Media Player working very fast and good, and Mediabox the same. And I think the nokia go faster.
Thanks to everybody. You have a beer here in Derry North Ireland