PROBLEM TO EDIT MY MOBILE APP

PROBLEM TO EDIT MY MOBILE APP content ON PC with Windows 7

I Tested  a sample on iBuildApp Windows XP and WHILE EDIT content (Add and etc..) and it was OK.

But on my second PC with Windows 7 SUDDENLY WHILE EDITcontent I recieve message :

"Missing content                            Pages listed below are incomplete "

What is the problem?

iBuildApp EDIT Content Problem.jpg