can't resume an old session

Using an AMD 7950.I'm using a dictionary attack.

i started with this command


so this got the attack started and it went to 20% or so when I had to shut down my PC

next day i went back and tried to resume the session by using this command line


but that command line did not restore the old session. the cracking process started at 0% when it should have at 20% from before

anyone know what i'm doing wrong?