[Zope] Problems with long strings in RDBMS

I´m having problems trying to add strings greater than about 150 chars. These strings make the database cursor to crash. I have mysql with ODBC with ZODBCDA under W98. I´m sure it is a ZODBCDA problem, because of I tried to connect with Access2000 and the row with the long string is inserted and I can read it. I tried to hack the code, but I think the problem is in a binary file of the ZODBCDA distribution. Someone experiment something like this?. is it better if i post the traceback? I have searched on Zope.org but it´s nothing about this. ------ Antonio Carrasco