axWebBrowser Filling out Poll

I am trying to create a win app that will test polls that I have created on sites, after submitting a vote, it takes you to a page with results. I am using the axWebBrowser to do this. If I place my code in documentComplete I can get it to cast 1 vote. But I want to vote hundreds of times. If I try to create a loop I am unable to vote even once. 1)Is there a way to determine when the page fully loads, then i could place it in the loop 2) any ideas why i am not even able to vote once. Here is the code that i am using

for (int count = 0; count < max; count++)
{
object loc = "sitewillpoll";
object null_obj_str = "";
System.Object null_obj = 0;
this.axWebBrowser1.Navigate2(ref loc, ref null_obj, ref null_obj, ref null_obj_str, ref null_obj_str);

HTMLDocument myDoc = new HTMLDocumentClass();
myDoc = (HTMLDocument)axWebBrowser1.Document;

HTMLInputElement radioButton = (HTMLInputElement)myDoc.getElementById(strRadio);
radioButton.@checked = true;

HTMLInputElement btnSubmit = (HTMLInputElement)myDoc.all.item("vote", 0);
btnSubmit.click();
}