delphi Memo to msql text error..

[Andreas L]

Dear all,
i have a problem when insert memo1.text to field (text) in sql table..

form1.Table1.Active := true;
form1.Table1.First;
form1.Table1.append;
form1.Table1.fields[3].asstring := form1.DBMemo1.Lines.Text;
form1.table1.post;
form1.Table1.close;

if the lines in dbmemo1 exceed 100 lines, the error message are "invalid blob length"..the message appear after the "form1.table1.post;" syntax is execute.

i use odbc to connect with mysql server..

please help me..