Datastore fetch again...

[Disasterpiece]

Hi

My Problem is equivalent to this vb4 related: https://vborg.vbsupport.ru/showthread.php?t=250923

Now, I want to port my plugin to vb3 as well.
Unfortunately, this method doesn't give me any results at all:

PHP Code:

$vbulletin->datastore->do_db_fetch("'my_plugin'"); 


After fetching the datastore item via this command, the variable $vbulletin->my_plugin is NULL.
In the datastore database table, I can see that the data has been stored there successfully, only the "get-data-from-datastore" seems to fail at the moment.

Any help on this?