What you are doing is all wrong and will never get your device back to normal !.

First you need to read the FULL explanation given on this forum how to flash your N900 and digest it untill you know what to do.

It is very simply to know by the way you are talking that you have not read up at all on flashing the device.

https://wiki.maemo.org/Updating_the_firmware

Now please go and read ALL of this and get some knowledge behind you and i can assure you your N900 will be as good as new, good luck and enjoy because it is fun to learn.

Any problems whatsoever that you have you can come back on this thread that you started and ask questions but not before you have read the full guide ok.