vb.net - SOAP api login request not logging in -

i have in button click following code:

dim pass string dim user string dim token string

    pass = "admin"     user = "admin"     token = "tlxnorej7gugkmulpzb0pgx6izx2u3to"      dim islogin new wpfbrowserapplication1.servicereference1.apiloginrequest     islogin.security_token = token     islogin.password = pass     islogin.username = user 

i go , check api users logged in , doesn't show in logged in