Trying To Get Output Parameter From TSQL Query

I am trying to return an ouput parameter from my query. I have tested the stored proceedure extensivly within the SQL Management Studio, and I know it works fine, so that means the error is somewhere within my code, but for the life of my I cant figure where.

Here is my stored proc:

  set ANSI_NULLS ON
set QUOTED_IDENTIFIER ON
go

-- =============================================
-- Author:Name
-- Create date:
-- Description:
-- =============================================
ALTER PROCEDURE [dbo].[tblSiteVisits_FindOfficerName]
@VisitID int,
@OfficerName varchar(100) output
AS
BEGIN
-- Variables
Declare @OfficerID int
--Declare @OfficerName varchar(100)
-- SET NOCOUNT ON added to prevent extra result sets from
-- interfering with SELECT statements.
SET NOCOUNT ON;
Select @OfficerID = (Select top 1
OfficerID from tblSiteVisitOfficers Where VisitID = @VisitID)

IF (@OfficerID Is Null)
BEGIN -- Get the None Registered Officer
Select @OfficerName = (Select top 1 OfficerOther from dbo.tblSiteVisitOfficers Where VisitID = @VisitID)
print 'Got unregistered Officer ' + @OfficerName
END
ELSE
BEGIN -- Get the Registered Officer
Select @OfficerName = (Select OfficerFName + ' ' + OfficerLname from dbo.tblOfficers Where OfficerID = @OfficerID)
print 'Got Registered Officer ' + @OfficerName
END
END

 

And here is the code I am using to access this proceedure:1 Dim blah As String
2 Dim conn2 As New SqlConnection()
3 Dim cmd2 As New SqlCommand()
4 conn2.ConnectionString = _ConnString
5 cmd2.Connection = conn2
6 cmd2.CommandType = CommandType.StoredProcedure
7 cmd2.CommandText = "dbo.tblSiteVisits_FindOfficerName"
8
9 cmd.Parameters.AddWithValue("@VisitID", Convert.ToInt32(row("VisitID")))
10 cmd.Parameters.Add("@OfficerName", SqlDbType.VarChar, 100)
11 cmd.Parameters("@OfficerName").Direction = ParameterDirection.Output
12 Try
13 conn.Open()
14 cmd.ExecuteNonQuery()
15 blah = cmd.Parameters("@OfficerName").Value.ToString()
16
17 Catch ex As Exception
18 Throw ex
19 Finally
20 conn.Close()
21 End Try
22


 

However there I never recieve the output value, and because of the way my database is structures, there is no possible way, that there is no output value.
If anyone can help, that would be great, kind regards.