Please doublecheck that "Wassup recording" is enabled in "Wassup-Options"=>"Statistics Recording" tab.
If that is not the problem, then your blog is probably completely cached as HTML+javascript. Wordpress and PHP are no longer rendered your pages on-the-fly. If you did not install a caching plugin, then your ISP must have done so. You will need to talk to them about undoing this.
FYI. To check for caching, look for Wassup's comment tag in the page footer in "view source". It has a timestamp. If that timestamp does not change after you reload the page, then your blog is cached.