Scriptmanager Conflicting With Button - Unable To Postback

I'm working on an asp.net app and I have some controls that are created dynamically on the OnInit event. One of that controls is an asp button that has been working fine until now. When I add a ScriptManager to my page, that same button is unable to postback. It's only working if a take the ScriptManager out. Has anything like this ever appened to somebody else? Am I invalidating the page somehow? Edit: This is my script manager tag:

<asp:ScriptManager ID="ScriptManager1" runat="server"
EnablePageMethods="true" EnableScriptGlobalization="true"
EnableScriptLocalization="true">
</asp:ScriptManager>
//My Dynamic Button:
Button button1 = new Button
{
ID = "button1",
Text = "Ok"
};
button1.Click += new EventHandler(Button1_Click);