Import shows wrong number of accounts and never ends

Hi,

I'm trying to perform a migration from a RHEL 5 server with ZCS 6.0.13 to a RHEL 6 server with ZCS 7.1.4, following this guide: ZxBackup: Incremental migration with ZeXtras Backup - ZeXtras Suite Wiki. (I'm using ZxBackup 1.2.9)
I was able to do a full scan with ZxBackup on the source server, with a total number of accounts of 4151.
Then, I tried to import the backup on the destination server, using the zimlet (and excluding system accounts). The import starts running, but on the zxsuite backup monitor I see a total of only 410 accounts. It imports ~ 407 accounts, then gets stuck in one account and never finishes.
I tried reinstalling Zextras, and starting over the import, but the problem persists.
Could anyone help me with this?

Thanks.