I suppose the memory on the server doesn't meet the requirements but in fact, this is only a testing server only...
CPU : Xeon 2.4GHz
Mem : 512 Mb RAM + 1.5 Gb Swap
Enough disk space (about 40 Gb)
The memory seems to be DDR-ECC but I'll have to check when I'll be back on the testing site tomorrow.
And this is not a VM
Thanks for your help. Really appreciated.