I've rooted my Sony Xperia X10 using z4root from the Android Market. I confirmed that my device was rooted by installing BusyBox, TitaniumBackup, Superuser, and reconfirmed that I had (#) by using Android Terminal. When I tried using the following
busybox mount -o rw,remount /system
I get a message "you must be root"
I don't get it...does this mean that my device is not "completely" rooted? Any information would be lots of help right about now.