Urgent!! Using A Store Procedure On Asp.net

How can I use a store procedure in a asp.net. I have been trying many ways but it shows an error : "Invalid attempt to read when no data is present." when I am trying to read the data reader


My store procedure just return one value.





StoreProcedure:





create procedure sp_recordstudent


@studentid integer


as


if exists (select * from tbl_student where int_studentid = @studentid)


select strregistro = 'true'


else


select strregistro = 'false'


go








ASP.net





Dim Conn As New SqlConnection("server='(local)';database='BSF';trusted_connection=true")


Conn.open()


Dim Comm as SqlCommand = Conn.createcommand()


Comm.connection = conn


Dim Trans as SQLTransaction


Dim Query as String = ""


Dim DRStudent as SQLDataReader








'Verify whether the student exists


Query = "execute sp_recordstudent @studentid = " & intSId


Comm = New SQLCommand(query,conn)





'Comm.commandtext =


DRStudent = comm.executereader()


blstudentexist = DRStudent.getstring(o)


DRStudent.close()