Sql Parameter Error When Runs On Server

When im testing in local machine... my app works fine... but when i publish it on server... the sql DateTime parameter get an error:
 

ERROR ON SERVER : String was not recognized as a valid DateTime

my code:SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["StringDeConexao"].ConnectionString);

SqlCommand oCmd = new SqlCommand("spcCadLjItem", con);oCmd.CommandType = CommandType.StoredProcedure;

 

oCmd.Connection.Open();SqlTransaction trans = con.BeginTransaction();

oCmd.Transaction = trans;

oCmd.Parameters.Add(new SqlParameter("@dt_exclusao", SqlDbType.DateTime));

oCmd.Parameters["@dt_exclusao"].Value = DBNull.Value;

oCmd.ExecuteNonQuery();

 When I inspect the type of parameter on my machine its ok.. SqlDbType its DateTime... and runs perfectly...
Why it doesnt work when i publish on server???????

 tks!!