Problem with displaying the submenu

in my template located above the "hot-image-slider" the main menu; the main menu once again, there is a sub-menu. The entries of the sub-menus are not displayed, but now the mouse-over. I use a different slideshow module as Nivo then appears the sub-menu. On a forum I read that this problem only with the "Hot-Image-Slider" is - unfortunately there was just the hint to use a different module instead of "Hot-Image-Slider". Has anyone here still have a tip?
Or you can solve this with z-index in any particular file?

Yes setting z-index will probably resolve that, but send us link firs so we could point you exactly.

Unfortunately I have the template currently only locally (xampp). , The z-index in the template file template.css or be changed style.css in the module file?

If you know what css rule to add just add it in your template file or you can find css file in module folder and add rule at bottom.

I'm currently no further - in a forum of the templates I have read:

"This is brought about by the jquery conflict among extensions and the main menu. The solution normally is to disable jquery in the module/extension which has it enabled. Alternatively, you may use nivo slider."

But if I disable jquery, then the slider does not (error in mod_hot_image_slider/js/scripts.js).

Right now I can not just continue - not someone has a specific tip?

We can not help you without seeing your site, you can host it temporally on some free hosting.