Triple Boot OSX, W7 , fail after Ubuntu 11.04 install

#1
So i successfully installed OS X and Windows 7 (64bits) on my PC,
Booting on OSX or W7 using EasyBCD works like a charm.

Things get complicated when i install Ubuntu 11.04 (64bits)

Finishing Ubuntu install,
reboot and get the GRUB menu
when i select Windows 7
i get this screen :

===============================================
Windows Boot Manager

Windows failed to start. A recent hardware or software change might be the cause. To fix the problem :
1 Insert your Windows installation disc and restart your computer.
2. Choose your language settings, and then click "Next."
3 Click "Repair your computer"

If you do not have this disc, contact ... bla bla

File : \Boot\BCD

Status : 0xc000000e

Info : An error occured while attempting to read the boot configuration data.
===============================================


Of course point 1,2,3 are a dead end

Any help appreciated !

Thank you