I can mount the image but then...nothing

[blindside70]

I use daemon tools to mount an image of an electronic dictionary I have. I've had no trouble mounting it on other computers (including an identical one to mine) yet when I do it on mine it mounts, and when I click to open it I get a screen that gives me the option to 'install' but then nothing happens...

It's a .mdf file and when I search for it thru the daemon tools icon in task bar it only shows the .mds file. Same with .cue .bin combos it only shows the .cue file, even though both files are in the same folder. Any help would be nice, thanks...

I've already uninstalled, reinstalled btw...