The game should have no problem running on a 64 bit version of Windows,
Maybe you had a faulty driver, that caused XIV not to work, would be worth looking into, since you just reinstalled.
I would try once more with a 64 bit installation, and see if XIV did not run if you had all up to date drivers installed.

Grit, in Europe (as well as most other countries) we use the format day-month-year.