Are you trying to load the QVW in another computer or with another user ?
Since you are using PDE, this is very relevant !
1. if you have a Qv license, try to open the QVW with a licensed QV.
2. If you don't, try to load the QVW in the same environment where you have developed everything.
3. if the previous environment is not available any more, upload the QVW file to http:\\share.qlik.com and download it in your new QV PDE environment
Good luck !