Hetero:
I uploaded my products and everything is there when I look at the template Alien Stemware. But if i change templates for example if i switch to the custom template, at first i see everything but if i click on a link or refresh the page the only left on the page is the header, everything else disappears.
Firstly a short lesson in zencart templates. If you are using a template called "Alien Stemware" then this is your 'custom template'. If you install any modules, etc and they refer to a folder called 'CUSTOM' it isn't meant to be taken literally, you are supposed to substitute 'CUSTOM' with the name of the template that you are actually using.
Zencart itself doesn't have a 'CUSTOM' folder. Its default template is called simply 'classic', and although it is quite possible to keep this default template as your 'custom' template it isn't a good idea because changes you make will get overwritten with any zencart updates.
This leads to the cause of your current problem, because somewhere along the line you have created a template folder that is literally named 'CUSTOM' and we can't even guess what is, or isn't contained in that folder, so faultfinding using this non functional poorly named template will be futile.
What you should be doing to sort out template issues (which is what you appear to have) is to revert back to the 'classic' template which should not have been modified or changed in any way whatsover. This gives you a 'clean slate' for testing/debugging purposes.
If you do wish to use an modify the 'classic' template it, and its folders should be copied and renamed to something of your choosing.
I hope you find this useful.
Cheers
Rod