Custom audio on original Tonie

Hi,
I have a question about adding extra content to an original Tonie. I do everything in english but my wife is polish and we are trying to add polish stories to the winnie the pooh tonie.

I downloaded the original and added the polish music and stories to it. Converted is to taff and have it on the teddycloud and linked the new taff to the tonie. Refreshed the toniebox and it doesn’t download the new taff but plays the currently downloaded version. Then after the last track of the original taff it hangs turns red and says it can’t access the internet.

Am I doing something wrong?