Probable BUG in MyODBC connection

[fremsoft]

Hi people,
I'm connecting to my MySQL db on Linux RH9.1 through MyODBC 3.51.06 from Win2000 with program written in C#.
Following the source code of library I'm written down to execute queries:

public void Select(string sql_what, string sql_from, string sql_clause)
{
//E.g. Select("Colonna_1, Colonna_2", "Tabella_1", "Colonna_1 = 'pippo'")
string select_sql = "SELECT "+sql_what+" FROM "+sql_from+" "+sql_clause;
bool ok = false;
int retries = 0;

while ((!ok) && (retries < n_max_retries))
{
ok = false;
try
{
OdbcConnection dbConn = new OdbcConnection("DSN=mydb;");
dbConn.Open();
OdbcCommand myAccessCommand = new OdbcCommand(select_sql, dbConn);
OdbcDataAdapter myDataAdapter = new OdbcDataAdapter(myAccessCommand);
myDataSet = new DataSet();
try
{
myDataAdapter.Fill(myDataSet, sql_from); // $$$$ HERE IS ERROR
ok = true;
}
catch
{
ok = false;
}
finally
{
myDataAdapter.Dispose();
dbConn.Close();
}
currentTable = myDataSet.Tables[sql_from];
}
catch //(Exception e)
{
ok = false;
}
retries++;
}
if (!ok)
{
// server disconnected;
throw new ApplicationException("Select server Error");
}
}

The problem consists in that:
1 - first of all I try to get data from the server correctly
2 - then I disconnect the LAN
3 - when I try to get other data from the server the program blocks to
>>> myDataAdapter.Fill(myDataSet, sql_from); // $$$$ HERE IS ERROR
with no exceptions thrown!!! neither error code returned back!!!

Thanks.