Category page empty after import products database

Hi guys, I need some help here.

I just imported my categories and products database from another website i had created. After I import to my new website database, I found that the products and categories are there as expected, but once click into a category, the category page show nothing.
Here is the problem: http://www.exoreptiles.com/international/index.php?main_page=index&cPath=1

More detail please... are BOTH websites zencart?

ZC uses a RELATIONAL system in the database and in the case of products and categories, the relevant table is products_to_categories

Yup, both of them are zencart.
I have imported products_to_categories from the database as well.
The problem is the category page show nothing now.
From the link provided, the category sidebox shows there are subcategories available, but the category page is empty.

I just figured it out what is the problem.
Actually the template I'm using has a scripting problem in it's own tpl_index_categories.php.
The problem is solved after I edited the php code in it.

Anyway, thanks for your advise.