This new problem (it can't read the file) is probably not related to the original one (it reads the file but can't display it). A quick search brought up one hit:

Doom9's Forum: Imagesource doesn't work for some reason
http://forum.doom9.org/showthread.php?t=130519

Check it out and see if it helps. Be sure all your files are in the same work-folder so that there is no file path problems.

I know it's a pain. It's a programming language ...

BTW, if anyone knows of something that might work for one or both of these issues, please suggest it.