Hi,
Since it's impossible for us to tell why any given application is working under IIS but not UWS due to multiple configuration settings in both, would you mind providing more information on how application is registered with UWS and in IIS. Screenshots are always helpful - they can be attached to forum posts.
Also, please check whether the application in question uses IIS7-specific configuration settings in its web.config. In general, if an application can be configured to run in IIS6, it can be configured to run under UWS, but if application is IIS7-specific, you would need to contact application vendor to rectify the problem.
Best regards,
UltiDev Team.
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