Debian 7 + ESXi 4.1 + Dell R620 = panic early exception

Hello

I want to replace my old PowerEdge 1950 by a new R620.

So I have installed ESXi 4.1 on the R620, then I integrated it in my vCenter.

I updated ESXi 4.1. The version is now 4.1.0 1363503.

The R620 has two processors E5-2650v2.

I try to power on a VM on it :

     Debian 7 amd64

     Kernel 3.2.0

After the grub, the VM stops and said : panic early exception 0d rip 10 error 0 cr2 0

 And vSPhere client said The CPU has been disabled by the guest operating system. Power off or reset the virtual machine.  

I tried with a windows 2008R2 VM and it has boot without any problem.

Have you an idea ?

Thanks for help