w850 memory card not found
 

hello sir, i need some help from all senior here. i have 1 w850 with water damage
and after service the phone, all in good condition accept the memory card slot.
i already insert the memory card, but still not found............what should i do?
pls help.........thanks n regards:(:(:(

still no one can find the solution?

i also need tis solution,,,any one can help me......