Update Mageia2 with Mageia3Alpha3

Hello,
On a laptop DELL Latitude D630 I tried this update.
At the end of the Installing step, I had the message:
"An error occured"
"Installation failed"
then
"Do you have further supplementary media ?
(followed by the list : none, CDROM, Network ...)
Here, whatever my answer was, I entered a loop which always lead to the same message. When I chosed Internet, some packages were updates and again the same message. No button to go out. I made a salvage reboot, but neither mageia2 nor mageia3 were working any more.
The more disturbing is that I can't re-install Mageia2 with the Live CD, black screen after some comments followed by Ok. the key F6 to enter options isn't working.
So, I am re-installing Mageia1.
On a laptop DELL Latitude D630 I tried this update.
At the end of the Installing step, I had the message:
"An error occured"
"Installation failed"
then
"Do you have further supplementary media ?
(followed by the list : none, CDROM, Network ...)
Here, whatever my answer was, I entered a loop which always lead to the same message. When I chosed Internet, some packages were updates and again the same message. No button to go out. I made a salvage reboot, but neither mageia2 nor mageia3 were working any more.
The more disturbing is that I can't re-install Mageia2 with the Live CD, black screen after some comments followed by Ok. the key F6 to enter options isn't working.
So, I am re-installing Mageia1.