When Resin is launched it loads a DLL. If you experience a startup problem due to a missing VF system it may be caused by the Resin server not being able to locate the DLL. This DLL is typically found in <resin-home>/bin. To make the Resin DLL available to the Resin JVM add <resin-home>/bin to Resin3’s Library Path preference page (see Window menu >Preferences > Application Servers > Resin3 > Paths).