xposed framework not installing on cubot zorro 001

I updated firmware of my android cubot zorro 4.4.4 from 001.05 to 001.09. True almost everything I have read to to make exposed installer work, but nothing, it won't install. After installing it on my phone it always says:the latest version of Exposed is currently not active. Did you install the framework and reboot. At the logs of exposed it says: could not read log: /data/data/de.robv.android.xposed.installer/log/error.log:open failed: ENOENT (No such file or directory)
I don't know what to do. Please help me. I tried different versions, last 2.7 experimental1, but nothing. Please.