But when i input other wallet like with the next letter priv key 1184cd2cdd640ca42cfc3a091c51d549b2f016d454b2774019c2b2d2e08529fe ,it doesn't find anything for days.This makes me thing that the tool doesn't work properly.What's your opinion about it?
It works properly and also proof that Bitcoin private key isn't easily brute-force able (unless it's generated with poor RNG or flawed implementation).