Select surface from Revit

I am trying to use Dynamo in Revit . In ‘’ Select Face ‘’ command , select button is not working. I couldn’t clicking on it. How can I select a surface from Revit file ?

Hi Ezgi,

Follow the screenshots below:

Thank you very much ! Making manuel mode solved my problem. But I have one more problem . When I creat some things in dynamo I couldn’t see it in Revit . I couldn’t make a contact between them .