BOOTMGR absent

System Config:
Vista
CORSAIR 4GB SDRAM DDR2 800
GIGABYTE P35 DS3R
Radeon HD4870
3 HDD

I explain my problem quickly. I have three hard drives C: G and T:. Vista installed on G:

I transferred the hard drive C: to put a more recent and more powerful that I have installed vista to change also my other hard drive (G: ).

I therefore find myself with a dual boot vista. Each time I only start for the new update etc ... Everything is ok.

Now when I turned the G drive I get the message
BOOTMGR absent Ctrl + Alt + Del to restart ...

I do not understand what it is from. Has anybody an idea and possibly a solution?

Boot on the Vista DVD, then start the Recovery Console. In short, repair your Windows Vista installation on G drive.

I have already tried and it does not work

If I understand correctly, you change the C: on which you install a new Vista. If you let the G: boot then you want new Vista on it, but if you have already removed then that is why Bootmgr error comes from.