Action "Click" doesn't work althought the button object is found

Hi all, I'm a new stater researching testcomplete tools. Could you please help me with my issue that I creates a script to login into smartbear support page by unitest VB script, but whenever I call click action, My script is stopped by error althought I used to tried to find button object that I want to click and the result is "object is found". Here is my script you can see that to more details. Thanks for your help very much.




sub Demo





    dim browser

    dim page

    dim panel

    dim defaultpage

    

    Browsers.Item(btChrome).Run("http://support.smartbear.com/Samples/TestComplete9/WebOrders/Login.aspx")

    

    set browser = Aliases.browser

    set page = browser.Page("http://support.smartbear.com/Samples/TestComplete9/WebOrders/Login.aspx")

    

    page.Wait()

    

    set panel = page.Form("aspnetForm").Panel(2)

     

    panel.Textbox("ctl00_MainContent_username").SetText("Tester")

    panel.PasswordBox("ctl00_MainContent_password").SetText("test")





    if  panel.SubmitButton("ctl00_MainContent_login_button").Exists then

      log.Checkpoint("button exists")    

    else

      log.Error("button not exists")

    end if





    ' The result of above if script is true but action click this button is error



    panel.SubmitButton("ctl00_MainContent_login_button").Click

       

    set browser = Aliases.browser

    

    set defaultpage=browser.Page("http://support.smartbear.com/Samples/TestComplete9/WebOrders/default.aspx")

    

    if defaultpage.Form("aspnetForm").Table(0).Cell(0, 1).Panel(0).TextNode(0).Link("ctl00_logout").Exists then

      log.Checkpoint("Item exists")

      defaultpage.Form("aspnetForm").Table(0).Cell(0, 1).Panel(0).TextNode(0).Link("ctl00_logout").Click

    else 

      log.Error("Item not exists")

    end if

        

end sub