Help

I manage this blog via my iPad and up until now it's worked fine.  But now I have a problem and I'm stumped.  I'm unable to post or edit anything on the Field Trips page.  

Up until now I've tapped the edit button then tapped the screen where I want to enter text and a keyboard has appeared for me to type on.  But now the keyboard appears for a fraction of a second and then disappears again, so I can't write anything.  Other pages still work ok.

Can anyone out there help.....