Image Links in 1.4 - Windows

I am currently experiencing an issue (only on one machine) in our studio where the thumbnails in the Media Pro catalog are not linking to their actual files on our server. This is not allowing for the functionality of being able to double click on the image and open it in the finder window. I've doubled check the make sure all the images are in their correct locations and the paths to those images in the catalog are correct. Does anyone have any idea why this is not working? This is a new effect since I have upgraded to 1.4. Thanks for all your help.
Cheers,
Matt