Pls consider importing all images into \My Tableau Repository\Shapes
That should load all the images in ur dashboard.
Workaround (1) You can host all ur images on a URL which is accessible to anybody (eg. post them on Picasa with Open To Public) Capture URL for every image & load this URL address into ur data for each respective image.
Now using URL action you can display image into ur dashboard.
Workaround (2) If you dont want to host images on a website then load them into \My Tableau Repository\Shapes\ and you can manually insert images & toggle them using a worksheet filter...
Thanks a lot. I figured it out: because i was using a file path I had to put the file protocol in front and also replace all back slashes with forward slashes (eg: file://domain.net/folder1/folder2/file.fileextension).
Ya you can also host the images on FTP server & link them from dashboard...
Tableau recognizes the FTP server links...