A Weird Threading Problem

Hello guyz!
I need your help. While I was calling a .OCX object in my website, I got this error: "ActiveX Control [GUID] cannot be instantiated because the current thread is not in a single-threaded apartment". Here is my code:
 namespace WebVOIP
{    
    public partial class _Default : System.Web.UI.Page
    {
        //flags to know status of caller
        static bool inComingCall;
        static bool onTheLine;
        
        //variables in use
        static string newline = "\r\n";

        //Objects that handles the VOIP capabilites of the site
        //ATLH ...