Question about WinNT+IIS+PHP+ODBC Access Driver

I use PHP 3.0.11 on Windows NT 4.0 + IIS 4.0 + ODBC 3.51. I post long data to a MEMO fields of the MSAccess database, when the data is about over 16378, the following message is returned: Warning: SQL error: [Microsoft][ODBC Microsoft Access 97 Driver] Syntax error in INSERT INTO statement., SQL state 37000 in SQLExecDirect in d: \phpwebroot/mzfz/maxins.php3 on line 184 At last, I found that the same error is returned in VB, interdev , etc. but except MSAccess itself. In MSDN, the ODBC sdk shows that there are a function SQLPutData to put long data into database. Is there some odbc_ php functions to do it? Thanx a lot.