onserverclick is not firing

Hi Everyone,

Actually i have html control in page as <input type="submit" value="submit" runat="server" onserverclick="btnSubmit_Click" onclick="return true;"/>

I have given breakpoint to my event
protected void page_load(object sender,Eventargs e)
{
}

protected void btnSubmit_Click(object sender,Eventargs e)
{
Some code
}

When i run my page btnSubmit_Click is not firing but it is firing page_Load event...
Please help me in solving this issue...

Thanks in advance..