Error code 706 means: Error loading the ignore list.
Try deleting the ignore list. You can find the file at the following locations:
Windows XPCODE
C:\Documents and Settings\All Users\Application Data\Malwarebytes\Malwarebytes' Anti-Malware\
Windows VistaCODE
C:\ProgramData\Malwarebytes\Malwarebytes' Anti-Malware\