insert new record into SQL not working

Hi

I am trying to create a small software license database and when i try and insert a new record using


        Dim connstring As String = Nothing

        Dim sqlconn As New SqlConnection
        Dim sqlcmd As New SqlCommand

        connstring = "server=simon-pc;database=licenses;trusted_connection=yes;"

        sqlconn.ConnectionString = connstring

        sqlconn.Open()
        sqlcmd.Connection = sqlconn

        sqlcmd.CommandText = "insert into licenses (Manuafacture, appname, version, username, ci, license, po, invoice, date_logged) values(" & manufacturerCb.SelectedValue & "," & _
            applicationNameCb.SelectedValue & "," & verstionTxt.Text & "," & assignedUserTxt.Text & "," & machineNameTxt.Text & "," & licenseKeyTxt.Text & "," & poNumberTxt.Text & "," & _
            invoiceNumberTxt.Text & "," & dateloggedDtp.Value & ");"


        sqlcmd.ExecuteNonQuery()
        sqlconn.Close()



I receive the error message

Incorrect syntax near ','.

using VS2010 in the autos window the last place this gets to is version.

Can anyone shed any light on to why I am getting this please?

Thanks

Simon