I had the same problem with my iPhone 4 and WD MyBookLive showing the message: not connected to the internet -1009 when using the WD Photos and WD 2go apps. Yesterday I found the solution that worked for me:
First switch off WiFi on your iPhone, so you are just using the 3G connection. Then request for the codes you normally do on the dashboard of your WD MyBookLive and fill in those codes on your iPhone for both apps. The apps will work perfectly. After that, switch on WiFi again on your iPhone. Now the apps will work both on WiFi and 3G.
Good luck and let me know if this worked for you too.
