| a major part of client and server communication is about identical endpoint configuration:   you must specify a "clientPort" and "serverPort" for <notificationService> and the related ports must be open on the firewalls of the client and server   the service names do not match - "EntityService.svc" in the app.config and "EntityService" in the web.config   make sure the "remoteBaseURL" of the <objectServer> element can be resolved to an IP address from the client when using a machine name (LAN) or a DNS name (Internet).   the server ports do not match - "12000" in the app.config and no custom endpoint in the web.config (endpoint address="")       - since you are using a web.config then I am hoping you configured IIS to use port 12000 and opened that port in          your server's firewall since the default port 80 (usually open) is not being used for this deployment. A blank endpoint          address in the config will default to the IIS binding and port settings.       - Which IIS version are you using ?   according to the config files, you might be using 2 different IdeaBlade.Core assembly versions:   app.config 
<configSections><section name="ideablade.configuration"
       type="IdeaBlade.Core.Configuration.IdeaBladeSection, IdeaBlade.Core, Version=5.2.5.0 </configSections>
 web.config 
<configSections><section name="ideablade.configuration"
       type="IdeaBlade.Core.Configuration.IdeaBladeSection, IdeaBlade.Core, Version=5.2.6.0 </configSections>
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