hashcat 4.0 and 4.0.1

hi all,

i ve hardware configuration HD5970 , windows 7 64bit, and the driver 15.200 AMD.

Before 4.0, the crack code of the itunes hash <10 ( i remeber the password) and now to test the same hash on 4.0 and 4.0.1 is not crack code.
the command is  :
hashcat64.exe  -a 3 -m 14700 "$itunes_backup$*9*HASH" ?d?d?d?d.

Best regard.