Navigation Issue

Hi; Using WP and cCommerce plugin Shopp. All pages/nav was working fine. Now when you click on any home page links, all our site does is go to a page with a picture, no links, info, nada. I can see the actual pages in WP admin. This is what our host, TMD, says:
As for the missing text on the blog pages, I have investigated this in details and to make sure that this is not related in any way to the hosting environment, I have transferred a copy of your account to an independent server which has no limitation in terms of cpu/ram/processes. Unfortunately, the issue still present. I have even flushed the cache and tried to disable several plugins that might have affected the content but this did not resolve the issue. We have investigated the issue in details and despite all of our efforts to resolve it we failed to. We are trying to serve every single request, however your ticket requires deeper development/web programming knowledge and that is why we are not able to assist you.
My developer has checked the navigation, etc. and it’s all good. Any suggestions on how to diagnose? Thanks, Kevin