Default [Q] Rooting lost


Until today, I was using the v18 of the Omega ROM on my Galaxy Note 2 and today I installed the v26. But the Wifi was bugging, so I tried to flash the fix from CWM. I didn't manage because it didn't find the file and when I quitted CWM, my root has been disabled. Since that, I don't manage to root it again, I have done like many tutos but each time, even if the software like Odin was telling me it was OK, when I launched SuperSU, it tells me that no SU Binaries is installed. I have tried to uninstall/reinstall, I have also tried with Framaroot, but it tells me to try with another exploit, but there is only one...

I don't know what to do, I can't back up my folders and apps with titanium backup without root... Do you have a solution ?

EDIT : I have installed again CWM recovery, and then the Omega ROM. And everything is good now.