Error Message: Can’t Download, Yo don’t have permission to download this file. For help, try contacting the person who manages this site

I have just made my switch to Windows Phone (Bought Nokia Lumia 720), the phone looks awesome, features are great and I love it. But there is one problem, I have my skydrive accounts prior purchasing my phone, and I have also installed skydrive apps into my phone. But somehow, I saw my files inside my phone skydrives, but I can't download it whether it's Excel or my word documents, strangely enough, I can download my PDF files. The error messages was "You don't have permission to download this file. For help, please contact the person who manages this site" Any Idea? PLEASE HELP!!!

Cheers,

Deddie