Object reference not set to an instance of an object

Hello I got the following error message:

Object reference not set to an instance of an object.
6/27/2006 9:17:02 AM Stack trace:
at MySql.Data.MySqlClient.PacketWriter.WriteStringNoN ull(String v)
at MySql.Data.MySqlClient.MySqlCommand.PrepareSqlBuff ers(String sql)
at MySql.Data.MySqlClient.MySqlCommand.ExecuteReader( CommandBehavior
behavior)
at
MySql.Data.MySqlClient.MySqlCommand.System.Data.ID bCommand.ExecuteReader(Com
mandBehavior behavior)
at System.Data.Common.DbDataAdapter.FillFromCommand(O bject data, Int32
startRecord, Int32 maxRecords, String srcTable, IDbCommand command,
CommandBehavior behavior)
at System.Data.Common.DbDataAdapter.Fill(DataSet dataSet, Int32
startRecord, Int32 maxRecords, String srcTable, IDbCommand command,
CommandBehavior behavior)
at System.Data.Common.DbDataAdapter.Fill(DataSet dataSet, String
srcTable)
at Fact.TestConnect.connect2DB() in
c:\Inetpub\wwwroot\Fact\TestConnect.cs:line 114
Cycle finished



My source code close to the error look like this:

DataSet milestones = new DataSet();
foreach(string sl in serviceLevelList) {
Console.WriteLine(sl);
MySqlDataAdapter adapter = new MySqlDataAdapter(
"SELECT From Table where x='y'", dest.Connection);
adapter.MissingSchemaAction = MissingSchemaAction.AddWithKey;
adapter.MissingMappingAction = MissingMappingAction.Passthrough;
adapter.Fill(milestones, sl); <- error occurs



milestones and sl are not null. has anyone an clue what might help?

thanks in advance!!

best regards,

Dennis