ZX Slideshow comes with jscript_jquery-1.7.1.min.js and not 1.9.1.

I'd guess your problem is caused by loading multiple instances of jQuery on the same page. You can check source and see the sequence .js files are loaded - make sure you don't load the jquery file again after the other js files.
A fix for ZX Slideshow was described here but this might break other functionality on your site so make sure you test it thoroughly.