I had my phone back from repair yesterday ,i start installing some apps today and dicided to reboot.
when i wanted to boot ,all i get is the nokia logo and then it turns itself off ,and back on ,and back off ,etc ...

i already tried to flash the firmware and the mmc with vanilla ,but when i try, the flasher shows : nothing to do

someone please help me ,i don't want to miss it again for 7 weeks

Ok.

Couple of questions:
1. Have you followed the wiki? (I know it's a silly question but I ask it nevertheless) Wiki page on flashing can be found here.

http://wiki.maemo.org/Updating_the_tablet_firmware

Have you done it in the correct order? Id est: Vanilla first, then the firmware? Have you tried only flashing the kernel?

2. What OS are you using to flash your device?

3. What were the apps you installed?