Unable to open docs from server on iPad using IOS6 and iWork

Since upgrading to IOS6 in ipad 2, when I log on to my work network and try to open Excel, Word or Powerpoint files in Numbers, Pages or Keynote apps respectively, nothing happens. Prior to IOS6 upgrade I could open anything and edit etc. Now the open in screen appears and when I press open in numbers, pages or keynote depending on file type, nothing happens. So I can't access any of my work files.

I bought my ipad to do work on, and now I can't do any work on the go rendering my ipad useless! Any ideas when or if Apple are aware of this major issue and whether if it will be sorted out???

At a loss really. 😮😟