Das machts jetzt auch nicht unbedingt besser Norbert 
The allmighty Readme says:
Zitat
Im Editor die Objekte unter „Andi_M → OEBB“ und „Andi_M → DB“ freischalten. In der
Auswahlliste findet man die Wagen als „OEBB Ddm“ und „DB Ddm“.
Which translates roughly to:
In the editor you will find the objects in „Andi_M → OEBB“ and „Andi_M → DB“.
They are listed as "OEBB Ddm" and "DB Ddm".
So, you will need to enable both providers because the cars are only in the ÖBB version. And of course you need to enable the loading in the wagons once placed.
And what siebziger said a bit rudely is: there is a polish forum for the TS around, why don't you try it there? Might be more easier and convenient for all of us, including you 