Resolved Titanium Backup ROOT Permission error

Oct 1, 2012
Hi I installed MIUI 2.9.29 on my Motorola RAZR XT910 today. When I tried to install Titanium Backup root. It said that it could not acquire root privileges and to verify whether my device is rooted and includes BusyBox. I tried other apps also that says that it cannot have root access.
I have turned on the LBE Guard also but I couldn't get it to work.
Please help,
Thank you in advance. :)