I assume you are running this as a CGI script? Do you get the same error if you run this code from the command line? You may want to use the Scalar::Util::tainted to see exactly which variable -T is unhappy with.

A common piece of advice when dealing with -T-related problems is to set your $ENV{ PATH } variable explicitly; e.g. $ENV{ PATH } = '/bin:/usr/bin'; it's worth a try, but I think that if this were the solution, the error message you'd be getting would be different.