Non-displaying .gifs in IE, FrontPage, Dreamweaver,


This is a problem I have had for a number of weeks. Most of the .gifs display but not all. There is no difference in the coding that I can find (coding copied and pasted, then the filename changed) and the file displays identicallyin IE, FP and DW.

Coding herewith:
<img src=“images/AboutButton.gif” width=“150” height=“30”><img src=“images/PhototButton.gif” width=“150” height=“30”><img src=“images/ProgButton.gif” width=“150” height=“30”><img src=“images/ContactButton.gif” width=“150” height=“30”>

Only the PhotoButton.gif does not display.

Any help would be much appreciated!