I can't open any files from my network drive on my computer

Hi all, I'm using win 7 Ent 64bit. I set up a FTP site to my network drive. Now, I can access and view my folders of that network drive (FTP site) via Window Explorer. But my issue is : Anytimes I click to open a file (Word, Excel, PDF ...) in my folders in that network drive (FTP site), Google Chrome always shows automaticly a "Save As" dialog box ( within a tab with something like that...