can't resume an old session

[notimetoeli]

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

i started with this command

Code:

oclHashcat64.exe -m 2500 attack.hccap wordlist.lst --force

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

Code:

oclHashcat64.exe -m 2500 attack.hccap wordlist.lst --restore --force

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?