When using Smart Refresh (new in WPF 7.0) or Partial Page Refresh in a model that is firing a Portlet Factory event only the source portlet UI will be refreshed as a result of the action. The event will have been received by the event handler in the target model, but there was nothing to tell it to refresh its page. There are a couple of ways to remedy this.
1) In the action UI builder(e.g. Link, Button...) that is used to initiate the event you can change the Post-Action Behavior to"Always reload the top-most page after running action". To see this option you will have to check the "Show Advanced Option" checkbox. This will cause the entire portal page to refresh.