Cover Art missing

[Headphone]

Hello. Sorry my english, im from Switzerland

How you can see in the folder of my NAS there is a JPG called „Mendellssohn-Symphonies 1&3“ But on my streamer Software it doesent show the Cover Picture. Perhaps you know what the error is.

N1_1244 is server, folder Share is first forlder, Mendelssohn-Symphonies Nos. 1&3 second folder. And then coming the music and cover files how you can see. I have ca 300 albums and only 20 have not a cover picture. Thats much better als with Twonky ehere it are about 40. But the reason why this album has no sover image i cant tell.

Thanks

Andy