We are using Fluent Ribbon to Render Ribbon on Custom Application pages deployed in Page for Sharepoint 2010

RibbonController.Current.AddRibbonTabToPage(HomeSectionTab(), this, true);

• Things work ok on IE 8/9 , however on IE 7 on page load all buttons on Ribbon come disabled , and same is behaviour if we user ribbon back button
  However if refresh the page (CTRL + F5) , the buttons are enabled as expected (based on TabDefinition)
  

We suspect commandEnabled(commandID) Method not getting called on first page load. Could you please provide any pointers help on the same.