C# WebBrowser Control - Form Submit Not Working using InvokeMember(“submit”)

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C#5.0

Hi I am clicking a input type button using web browser control but its not working.Below is the html link.

<input id="form1:verifyMemberEligibility_1_id21:verifyMemberEligibility_1_id22" name="form1:verifyMemberEligibility_1_id21:verifyMemberEligibility_1_id22" type="submit" value="Submit" onclick=" return verifyMemberEligibility_1disableMultipleSubmit(this.id);;clear_form1();document.forms['form1'].elements['autoScroll'].value=getScrolling();" alt="Submit" class="buttonCommand">

in C# I have written :

//MassHealthBrowser.Document.GetElementById("form1:verifyMemberEligibility_1_id21:verifyMemberEligibility_1_id22").InvokeMember("submit");

HtmlElementCollection Main MassHealthBrowser.Document.GetElementsByTagName("input");

                        foreach (HtmlElement MainTags in Main)
                        {
                            if (MainTags.Name == "form1:verifyMemberEligibility_1_id21:verifyMemberEligibility_1_id22")
                            {
                                MainTags.InvokeMember("submit");
                            }
 
                        }

Please help me how we can click this link using C# from web browser control.

Thanks for helping..

Thanks,
Aravind G