move OpenVZ from 1.7 to 3.2

Hello,

i have a old running VE 1.7 with a lot of OpenVZ Maschine.
Now i have installed the new VE 3.2 on a new Hardware.

How can i move the OpenVZ Maschiene on VE 1.7 to the new VE 3.2 Maschine?

Thanks,
Markus