A thing to all, with coderus system UI the, the notifications doesn't show due to a setting in the /usr/share/themes/sailfish/meegotouch/sysuid/sysuid.conf file.

After applying Notifications and Notification and Close button from N9QTweak (Tweak T3-1-1(3 if in OpenMode)-7 and T-3-2-2 respectively) the tewaks are not applied because the sysuid.conf file in Sailfish themes contains a setting that conflits with the one in base theme. the setting is:

In Sailfish theme
In base theme after applying Tweaks
For the above, in order to activate the Tweaks you have to change the setting in Sailfish file with the one in the base file (marked in red above).

PS: Obviously the notifications in the statusarea unfortunately reflect the one in Lock Screen, no preview, and in addiction still remain a black semi-transparent background behind them.