If u have shareDB and install ioftp as a service with this nice script, u must be careful about how u install odbc service, otherwise ioftp will crash everytime ioservice runs it.
When u add odbc service to listen to sharedb, instead of adding it in the first tab (user dsn), choose to add the sql odbc server under system dsn, otherwise your ioftpd will not be able to look at user db and obviously will crash.
Certificate trick has already been tested on 3 sites and works great so u shouldn't have problems anymore with ioftp as a service!!!
Enjoy
