All Files Error after Update Pages, Numbers and Keynote, Why ?

Dear Apple Lovers,

I am using ipad 2 Wifi + 3G 64 GB, I had updated my ipad from ios 4.1.3 to ios 7.1.1 two week ago.

After that All aplication and all file can be opened properly well.

The problem came after I updated Keynote, Pages & Numbers, all files could not be opened & all file name is change from alphabetical to numerical. All file content 2 type of file, 1 BuildVersionHistory and the other one is index.

if i open the file ... spreadsheet can't be imported... the file format is invalid

or in Pages...

document can't be imported... the file format is invalid...

If I want to share that document via icloud ... Can't Send Spreadsheet.. To send this spreadsheet, open it in Numbers for iOS first.

In other case... I create a new file in Pages, Numbers or Keynote.. but all the new files can't view in Tab Apps when my ipad is connected to my mac pro via iTunes. If I create a file using other aplication (example using DocToGo), a new file that is created can be seen directly in iTunes Tab Apps DocToGo.

in this morning when i open Numbers all my files are disappear including new file without the reason at all, please give me the best solution. I need your help very very urgent.... since my working datas is very very important.

Thanks and Best Wishes,

Asdans