Your link always redirects to this page http://www.ibuydirect.biz/homepage.htm, so we can't see the exact issues but we think we know what is wrong.
It seems that this is caused because you are trying to integrate the Nop Ajax Filters from the Fashion theme into the default nopCommerce DarkOrange theme. Note that the Ajax Filters that come with the Fashion theme are intended to be used only within the same theme and won't work outside it. If you want to try the Filters with the Default nopCommerce theme then you need to download the Trial version of the Filters and install them instead of the ones that comes with the Fashion theme.
You're right, the site is setup to redirect to a different page unless you are from an approved ip address.
And you are correct again the Nop Ajax Filters are from the fashion theme. When we purchased the fashion theme it did not state that the extensions used were modified and only good for that theme as you say. We though we were getting all the extensions + theme for that price, and actually we purchased multi web site license (close to double the price) as our intent was to always use it as a base but change when required. We want to be able to modify so for example we can change and use "view by [grid/list]" option. This presents a problem as again this was not clearly stated. Below is copied directly from the fashion theme overview. It does not state it is different version then if purchased separately or in ultimate extension pack (unless it's different there too!) which we would have probably purchased instead.
"Nop Ajax Filters which add powerful filtering capabilities to your category pages. The Nop Ajax Filters include Sliding Price Range, Specifications, Manufacturers and even Attributes filters. These filters can be easily managed from the nopCommerce administration panel and build their filtering ranges and options automatically from your categories and products information."
Any suggestions? Our purchase was made based on information presented on the site.
Please keep in mind, you have done a great job and it works great and looks great. My concern is strictly with the functionality of what we purchased.