Used this syntax
#SERVICE 4097:0:1:0:0:0:0:0:0:0:http%3a//localhost%3a8088/https%3a//zattoo.com/channels?channel=zdf&zattoo-email=xxxxxxx@gmail.com&zattoo-password=xxxxxxx
#DESCRIPTION ZDF 2
I removed the special characters for now. After the "channel=zdf" I used the "&" instead of the "?". Anyway I tested both, w/o sucess... :-( Allways just test pattern after buffering.
and your bouquet is working with Zattoo Free?