Could not find stored procedure 'GetDatesForMonth' is an error I receive on the aspx page

Could not find stored procedure 'GetDatesForMonth' is an error I receive on the aspx page. The page loads ok with a calendar and an iframe info box but i receive this error from my <asp:Label ID="lblMsg" Runat="server" CssClass="Alert"></asp:Label> code. The procedure is created in the database. Any ideas?

my ms sql server code to create the stored procedure is

CREATE PROC dbo.GetAllDateDetail (
@StartDate datetime
)

AS

DECLARE @beginTime datetime
DECLARE @endTime datetime

SET @begintime = Convert(datetime,convert(char(2),Datepart(m,@startDate)) + '/' +
convert(char(2),Datepart(d,@startDate)) + '/' +
convert(char(4),Datepart(yy,@startDate)))

SET @endtime = Convert(datetime,DATEADD(ms,-10,DATEADD(d,1,@begintime)))

SELECT
ItinID,
DatePart(d,StartDate) as ShowDay,
StartDate,
StartTime,
Venue,
City,
State,
Country
FROM Itin Where
StartDate BETWEEN @beginTime AND @endTime


GO


CREATE PROC dbo.GetDateDetail (
@ItinID int
)

AS

SELECT
ItinID,
DatePart(d,StartDate) as ShowDay,
StartDate,
StartTime,
Venue,
City,
State,
Country
FROM Itin Where ItinID = @ItinID

GO

CREATE PROC dbo.GetDatesForMonth(
@startDate datetime
)

AS

DECLARE @endDate datetime

SET @endDate = Dateadd(s,-1,Dateadd(m,1,@startDate))

SELECT
ItinID,
DatePart(d,StartDate) as ShowDay,
StartDate,
StartTime,
Venue
FROM Itin Where StartDate BETWEEN @startDate AND @endDate  

my code behind is

    Private Function DatesForMonth(ByVal Month As DateTime) As DataTable

        Dim cn As SqlConnection = New SqlConnection(cnString)
        Dim cmd As SqlDataAdapter = New SqlDataAdapter("GetDatesForMonth", cn)
        cmd.SelectCommand.CommandType = CommandType.StoredProcedure
        Dim dt As New DataTable

        Try
            AppendSQLParameter(cmd.SelectCommand, "@startDate", SqlDbType.DateTime, ParameterDirection.Input, 8, Month)
            cmd.Fill(dt)
            cmd.Dispose()
            cn.Close()
        Catch x As SqlException
            lblMsg.Text = x.Message
        Finally
            cn = Nothing
        End Try

        Return dt

    End Function