Does anybody know how the record locking via Edit() with DAO works?

Hi everyone!

When I use the Edit()-Methode to lock a recordset in a pessimistic-opened CDaoRecordset, the Edit()-Methode seemed to look more than
one record! Does anybody know, why the Edit()-Method looks more than the current record? I would be nice I anyone will reply immediately
because I will have to install this programm on Monday!

DB.Open("d:\\projekte\\dblock\\dblock.mdb", FALSE, FALSE);

pOrder = new CDaoRecordset(&DB);

pOrder->Open(dbOpenDynaset, "select * from order order by order_nr", dbSeeChanges);

pOrder->SetLockingMode(TRUE);

pOrder->MoveLast();

// Lock the current record! (or more?!)
try {
pOrder->Edit();
}

catch (CDaoException* e) {

if(e->m_pErrorInfo->m_lErrorCode == 3260) {

//...record is locked!
}
}

When I start two applications on my system this works fine. The second application recognize that the last record is locked.
But when I scroll forword in the second application, the previous 4 or 5 records are locked too. But there wqs only
the last record locked by the first application! I tried to turn off the DAO-record caching by the following statements:

pOrder->SetCacheSize(0);
pOrder->SetCacheSize(0);
pOrder.>FillCache();

But this didn´t work too.

I´m looking forward to any ideas, suggestions or what ever!

Thanks!

Marc