Adding second host to Web Connector

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Does anyone know why I am getting an error message "specified module not found" when I go into web connector administration and add a second host and then try to pull up a page for that host? e.g. first host works fine, but when I add a second domain name host and select which files are hosted by that host and try to call up a web page specific to that new host domain name, it gives this error. The on only way it works is to call it by 'firsthost.com/secondhostname/FMPro?....'