Exclamation [Q] Lost Root Access

Hi guys!!
It seems like I've lost root access for my Arc S (Looked Bootloader) as I'm no more able to make changes in my system folder even with Superuser saying "access granted" !!! I'm not even able to flash any zip over Recovery
I'm on ROM : Xperia Z1 Honami ROM Superlative Edition.
How can I get root access again??
Can I use DooMLoRD root tool??
Please help me