Sonicwall: from nsa3600 to nsa4650 import config

Hi guys!

In these days I'm trying to import the config file from nsa3600 to nsa4650.

As illustrated on official site I successfully exported the .exp config file from 3600 but when I try to import it the new firewall crash at all and become totally unreachable even connected with mgmt port. I have to hard reset the firewall and start again...

So, I've seen some clue with migratetool, but is almost impossible to rewrite the config file in that way, I'd spend less time write it by hand from scratch (almost) : ]

There is someone that could help and give any other suggestion?

Thanks in advance!

Simone