Hi Elmura,
Thanks so much for thinking to post the site source code! Most people don't think of the very helpful step. The issue you are having here is that the submit button isn't of the InputElement type. It's not really a button at all You can sneak around this by just calling the javascript the "button" is. If you look at where it is at you will notice if all conditions are met it is call the JavaScript sub: "__doPostBack"
You should be able call this sub using the ie.navigate method like so:
[vba]objIE.Navigate "javascript: __doPostBack('LinkButtonSubmit',''")
Do Until objIE.ReadyState = READYSTATE_COMPLETE: Loop
[/vba] I can't test it from here because of all the relative references, but I think it will work.