When I movved my site to this computer I made a .ste file to import.
I brought the site to my Windows 7 machine & imported the .ste file.
The next day I came back to make edits & the FTP did not work anymore.
I checked the setings & notice that he user name & password were blank. I thought maybe I forget to save.
I enterd the infoo again made sure it was working & saved & was able to edit the site. THe next day it happened again. I rekeyed evereything manually & it still does it. My version of CS5 worked better than this.