Hi. I don't have the office program - I just wanted to talk about the "not printing from Dropbox" problem.
Is your Dropbox app fully updated? If it is, may I suggest you contact the developers to see if they can help. I say this because my iPad3 on iOS 7.0.3 just successfully printed a page, from Dropbox, on my wireless Epson Workforce printer. So, it may be something with your Dropbox app. Or, it's not talking properly to the printer.
So, maybe the developers can help?
Marilyn