Web service on vb2005

Dear Netsuite team.

        What should i do to solve the problem ?

        When i run this script i got the error message below

        Dim n_Service As New NetSuiteService
        Dim n_CustomerSearch As New CustomerSearch
        Dim n_customerEntityID As New SearchStringField
        n_customerEntityID.operator = SearchStringFieldOperator.contains
        n_customerEntityID.operatorSpecified = True
        n_customerEntityID.searchValue = Trim(TextBox1.Text)
        Dim n_custBasic As New CustomerSearchBasic
        n_custBasic.entityId = n_customerEntityID
        n_CustomerSearch.basic = n_custBasic
        Dim n_searchResult As New SearchResult
        n_searchResult = n_Service.search(n_CustomerSearch)

Message error :
{"The AXIS engine could not find a target service to invoke!  targetService is NetSuitePort_2_5"}