C# 2.0 WebMethod ActiveX

SalutIncerc sa instantiez un activeX dintr-o web metodaprimesc:System.Web.Services.Protocols.SoapException: Server was unable to process request. ---> System.Threading.ThreadStateException: ActiveX control '8856f961-340a-11d0-a96b-00c04fd705a2' cannot be instantiated because the current thread is not in a single-threaded apartment. at System.Windows.Forms.WebBrowserBase..ctor(String clsidString) at System.Windows.Forms.WebBrowser..ctor() at Service.HelloWorld() --- End of inner exception stack trace ---cine s-a intalnit cu asha boala, cum se trateaza ?