Using Memo field

I am making a program that updates a memo field using an adodb recordset.  I need to update the field by adding text to the end.  But when I open the recordset for some reason it overwrites the existing text.  I beleive it has to do with the lockcode.  when I do not set a lockcode I am able to view the memo in a textfield, but I am not able to update the field.  When I set it to any other lockcode I cannot view it, but I can update it but it overwrites the current text.  Here is my code...

    'Open Comments Recordset
    sqlMemo = "SELECT MemoField FROM Comments"
    Set rsMemo = New ADODB.Recordset
    rsMemo.LockType = adLockOptimistic
    Call rsMemo.Open(sqlMemo, connAccounts)

    rsMemo.Fields("MemoField").Value = rsMemo.Fields("MemoFeild").Value & "Updated Text"

This let's me update but overwrites existing data.  HELP!
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is this line just a typo where MemoField is spelled wrong?

   rsMemo.Fields("MemoField").Value = rsMemo.Fields("MemoFeild").Value & "Updated Text"
completefearAuthor Commented:
it is a typo.  It is correct in my code.  Sorry about that.  I do not get an error becuase of the field name.
The UpdateBatch method requires a LockType of adLockBatchOptimistic.  Try this for your locktype.  
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If the LockType of adLockBatchOptimistic does not work try using transactions and the Update method:

rsMemo.Fields("MemoField").Value = rsMemo.Fields("MemoField").Value & "Updated Text"

This will provide some shielding between your memo field read and the memo field write, ensuring that the read finishes before the write begins.

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The problems are not with Lock Type.  It is with the Memofield type.  Please use getChunk and putChunk of Field object to put data reliably.  If the data size is more than ~>65000 the string will not be concatenated and put back.  

Try with getChunk and putChunk of Field object.  if you have any problem in usage pl. write.

Hope this will solve the problem.

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