SharePoint 2013 Workflow platform is not available

hi

I now open the SharePoint site and SharePoint Designer 2013. I click on new workflow and get the error:
"The option for the SharePoint 2013 Workflow platform is not available because the workflow service is not configured on the server."

I tried, Recreating workflow manager service, Disable and enable the workflow store service, and having only single workflow proxy.

I am using Sharepoint 2013 RTM, CLoud share env.

please, do any one have idea what could be wrong

thanks

regards Vimal