Two client on freeNAS

Hello,

I tested the iscsi http://iscsitarget.sourceforge.net/ and I could not use two or more clients connected to it appropriately. For example... If I connect two clients and I copy files to the first, pressing F5 on the second client it doesn't show the files.
If I copy different files to both clients iscsi they don't show the files copied from the other client and if I reconnect both clients they lose some files.

The some behavior happens on FreeNas?

Thanks