The" parameter count does not equal parameter value count" error is usually an indication that the version of the DotNetNuke.dll assembly or some other assembly does not match the version of a database stored procedure. It most commonly occurs following a failed attempt to upgrade the DNN platform framework or a module.
Please answer the following:
What version of DNN was running on the site before the problem started?
Did you recently upgrade the DNN platform framework or a module. If so, to what version?
Did you create a backup of the site's files and database before attempting any upgrades?
Describe in detail how you added another site or DNN installation to the server?
Do you have access via FTP to the site's files?
Do you have remote access to the site's MS SQL database?
Have you tried restarting the site's application pool on the server? Usually this can be done from your hosting provider's control panel, if not then by re-saving the site's web.config file on the server.