I cannot get either Image Capture or Preview to recognize my Epson NX400. The scanner shows up in the Library/Image Capture/Devices folder, but for some reason won't scan. Both programs simply state that the SANE program is in use by another application (?). I downloaded all the TWAIN SANE stuff so I could use the scanner through my version of Gimp, which also tells me it can't find the scanner either. Any suggestions?