Passing a array to webservice meathod

Hi , I need to pass some values in my text boxes as a array to my java web service method to obtain a result.
Dim txt1 As String Dim txt2 As String txt1 = txtbox1.Text txt2 = txtbox2.Text Dim arr() As String arr = New String() {txt1, txt2} Dim webserv as String = String.Empty webserv = Webservice1.checkEmpID(arr) CheckEmpID() is my webservice method and need pass the textbox values are string.
But I am getting a error message like "value of type 1-dimentionsal array of string cannot be converted to ArrayofJavaLangstring_litereal"

Please help, thank you so much!!