Cause : Unable to Create Directory in the LogLocation...Reverting to Local LogLocation to [WTTWorkin

Hello, NTDEV!
I got Cause : Unable to Create Directory in the LogLocation…Reverting to Local LogLocation to [WTTWorkingDir]\DefaultLogs error while I pass Txfs test in hck. What does it mean and how can I solve this problem? I’m trying to sign file system driver for win7.