1. user/pw same in FlexSpaces as with regular Alfresco clients 2. Problem could be you have a "/" on the end of the "Alfresco URL" Try changing the "Alfresco URL" in the FlexSpaces portlet configuration Setup page to "http://localhost:8282/alfresco/service" 3. Note that the FlexSpaces portlet will use this setting in the portlet setup page and override settings in the FlexSpacesConfig.xml (which has separate port, host, partial url settings) 4. Assume you also got the FlexSpaces webscripts registered by restarting your alfresco server or using the "Refresh Web Scripts" button on the "http://localhost:8282/alfresco/service/" web scripts admin home page. Also check on this page "Browse by Web Script Package" to verify that a bunch of /integratedsemantics/ web scripts are registered.