Do you have any hope of cracking it?I think you do as since you are still working on this thread which is an old one yet let me ask you a question,why do you think you can brute force this,the probability to crack it as said here is near 0% unless you have a huge amount of hash ready to use it for cracking and even so I doubt you can have any success.

I once told the Dave guy from the wallet recovery services just 5-6 characters from a lost wallet of a friend of mine where he thought he had like 0.20 Bitcoin and he Dave really cracked a 36 password characters code but it was a different thing.If you don't have that high amount of hash why do you even bother?