Can't use apps when connected with wifi on Blackberry?

[Jason]

I have a BB curve 9300 with no data plan, I downloaded many apps like facebook, whatsapp yesterday, and it worked well when i connected through wi-fi.
But Today when i can't use these apps anymore, it says *****We cannot reach server at this time******* Or something like that
I can still using the browser to view web pages but not apps
It's so weird What can I do?

 

[Angela]

Try turning off the data service (mobile network) and just using WiFi.
OR
restarting your phone always seems to work for little things like that. (pull battery out)
OR
Go through the settings and make sure each app is programmed to only be used in wifi connection (this is a pain in the ass to do)