Data type mismatch warning using DBI

I am using Perl 5.8 with the DBI module to routinely send parsed data to an Access db. Sometimes the incoming files may have errors so that numeric data appears as text. This causes my script to throw a warning: DBD::ODBC::st execute failed: [Microsoft][ODBC Microsoft Access Driver] Data type mismatch in criteria expression. (SQL-22018) at C:\myscript.pl line 422.