There is no disk for MicroSD in windows an explorer
 

on my Nokia n900 disappeared disk corresponding microSD, now when you connect to a Windows PC displays only one drive corresponding internal memory device. Firmware did not help, microSD format, too.
Included R & D mode flags:
- enable-rd-mode
- set-rd-flag = no-omap-wd
- set-rd-flag = no-ext-wd
But then everything turned off. Perhaps influenced by these manipulations.
Help solve the problem:(:(:(