WDphotos and Ipad2 problem. 'no devices'

I have an ipad2 and WD World Book Edition but can’t get the iPad to see the WB and keep getting the message ‘no devices in network’ Al other devices in my network find each other fine and my router can see both the wireless iPad and the wired Wd device. All software versions are up to date My WB is the one with the White light - any ideas as it is so frustrating. Thanks, Aidan

I haven’t seen that error before, is the Mionet service running on the configuration page of the MBW?