Web services,SOAP header Security was not understood.

Question

I am trying to call web service, but this give me "SOAP header Security was not understood."?

 Could you please suggest.

 

 

WebReference.IDepartmentService srvc = new WebReference.IDepartmentService();

WebReference.Department deprt = new WebReference.Department();

int val = 0;

val=srvc.GetCount(deprt);