If, with RaiseError => 1 on the connect, you really do get the error "Died at Monk.pl line 67." (on the execute of the insert), then I'd see if the latest version of DBI and DBD::mysql were installed, and then I'd think about reporting a bug in the DBD::mysql library. Even without RaiseError set, an error message should be printed to STDOUT (because PrintError is set by default), so there really should be some better indication of what's wrong. But before filing that report, cut your code down to just the bare minimum of prepare and execute of the insert with the data that it gets executed with, and see if you get the same (lack of) error.