Connecting excel vba to ALM 15

Hi All,

Am trying to load data into ALM 15 test plan using excel macro. So when establishing connection between excel vba and ALM 15 am getting error as "Activex component cannot create object" 429 .below is the code i used. Can you suggest me on how to establish the connection  between excel vba and ALM 15 (without SSO)

Set QCConnection = CreateObject (:"TDApiOle80.TDConnection")

QCConnection.InitConnectionEx "ALM url"