Where are the images stored? Might be that the images are not available and hence not being displayed (or links are broken)
Please note that any older versions of JavaFX- i.e JavaFX 1, 1.2 or 1.3 are no longer supported. JavaFX platform has changed and moved from the JavaFX Script to Java based JavaFX APIs. Read more about it here.
If you still want to use a syntax similar to JavaFX Script, you can check out Visage - which is a DSL.