2 Out of 3 Dspace sites on Tomcat using different ports Not Working --- Showing Default Tomcat Page

We have 3 Dspace Apps deployed on Windows 2012 Server on Tomcat 8.5.1 with IIS 8 as Frontend using AJP 1.3 Connector. The applications have been configured to be accessed via port 8080, 8082, and 8083 respectively and their sites added to IIS. However, when accessed externally only the site on port 8080 shows properly, the other two show Tomcats default page. We need someone experience with Tomcat on Windows Server to help fix this so that all three sites can be accessed externally. Further details below: (1). Dspace apps are in their respective folders in tomcat/webapps folder. (2). [login to view URL] is configured as follows. <?xml version="1.0" encoding="UTF-8"?> <Server port="8005" shutdown="SHUTDOWN"> <Listener className="[login to view URL]" /> <Listener className="[login to view URL]" SSLEngine="on" /> <Listener className="[login to view URL]" /> <Listener className="[login to view URL]" /> <Listener className="[login to view URL]" /> <GlobalNamingResources> <Resource name="UserDatabase" auth="Container" type="[login to view URL]" description="User database that can be updated and saved" factory="[login to view URL]" pathname="conf/[login to view URL]" /> </GlobalNamingResources> <Service name="Catalina"> <Connector port="8009" protocol="AJP/1.3" redirectPort="8443" /> <Engine name="Catalina" defaultHost="localhost"> <Realm className="[login to view URL]"> <!-- This Realm uses the UserDatabase configured in the global JNDI resources under the key "UserDatabase". Any edits that are performed against this UserDatabase are immediately available for use by the Realm. --> <Realm className="[login to view URL]" resourceName="UserDatabase"/> </Realm> <Host name="localhost" appBase="webapps" unpackWARs="true" autoDeploy="true"> </Host> <Host name="[login to view URL]" appBase="webapps/ngren" unpackWARs="true" autoDeploy="true" xmlValidation="false" xmlNamespaceAware="false"> <Context path="" docBase="C:\Program Files\Apache Software Foundation\Tomcat 8.5\webapps\ngren" reloadable="true"> </Context> </Host> </Engine> </Service> <Service name="app1"> <Connector port="8083" protocol="[login to view URL]" connectionTimeout="20000" redirectPort="8443" /> <Engine name="Catalina" defaultHost="localhost"> <Host name="localhost" appBase="webapps\yola" unpackWARs="true" autoDeploy="true"> <Context path="" docBase="C:\Program Files\Apache Software Foundation\Tomcat 8.5\webapps\yola" reloadable="true"> </Context> </Host> </Engine> </Service> <Service name="app2"> <Connector port="8082" protocol="[login to view URL]" connectionTimeout="20000" redirectPort="8443" /> <Engine name="Catalina" defaultHost="localhost"> <Host name="localhost" appBase="webapps\unimaid" unpackWARs="true" autoDeploy="true"> <Context path="" docBase="C:\Program Files\Apache Software Foundation\Tomcat 8.5\webapps\unimaid" reloadable="true"> </Context> </Host> </Engine> </Service> </Server> (3). Access to the server hosting the apps will be provided once engaged.