Tasker/Security Settings 2G switch not working on OnePlus X CM13

I'm stuck with my planned automatization with tasker and security settings. My idea is to automatically switch to 2G/GSM when I connect to a WLAN. When disconnecting I want to switch back to 3G/4G. I'm on Sultans CM13 on my OPX (rooted). What i did so far: Installed tasker and security settings (SS) and configured a tasker profile with a task using the SS plugin (based on [this XDA tutorial](http://forum.xda-developers.com/u/tasker-tips-tricks/guide-switch-to-2g-connected-to-wifi-t3330876)) . Under Actions --> Device Setting I picked *global* as table and set the value of *preferred_network_mode1* to 1 (I also tested 0). I also configured the shell script described in the tutorial. But my phone is not switching to 2G when activating the WLAN although the profile is active. #edit: I just saw that there is also a parameter called preferred_network_mode followed by a 10 digit number, but it is not working either. No switch to 2G or from 2G to 3G. Now I wanted to check if my phone/provider has another value perhaps, but when I'm executing: `sqlite3 /data/data/com.android.providers.settings/databases/settings.db SELECT name, value FROM global;` as su I get the message that the table global is not existing. Does anyone has an idea how I can access this database or how to configure Tasker/Security Settings on my OnePlus X (with CM13) in Germany (T-Mobile)?