Bonjour traffic not going through sonicwall fw

Hi there,

i recently placed a sonicwall firewall to create a new secure network in the internal network. the setup is simple, from the internal network which i'll call network A I assigned an internal IP address of to the WAN interface of the sonicwall firewall, then i configured the LAN settings to for network B. So far so good, the only issue i have is users in network B can't use apple bonjour to find printers on network A. I'm able to add the printer via IP address but i'd rather have bonjour autodiscovery work than me entering the IP address of the printer on every computer.
So far i've followed a sonicwall document outlining something similar but from a wlan interface, i followed the article using my wan and lan interface but i can't see to get it working.

this is what i folowed: Confiured dns for apple

Any ideas would be helpful.

thanks