If you just want the data in the column, rather than any inflated object DBIC has associated with it (DateTime, foreign key Row objects etc.), it's probably best to use $row->get_column($col), which avoids the variable / method name substitution.

Having said that, I've just tried your code with one of my own databases and it works fine. If there was a problem with the column names, I would expect DBIx to complain, so it's possibly a typo somewhere else.