Works for me when I set that date. Make sure you change the code appropriately:

;Enter your birthday infomation here:
var %birth.month = October
var %birth.day = 17
var %birth.year = 1968
var %birth.time = 00:00:00

...and don't change anything else in the code, and make sure it's all there.

Result:

* Mentality has been alive 1843weeks 5days 13hours 32minutes 39seconds (35.336247 years)
* Mentality will have a birthday in 23weeks 5days 9hours 27minutes 21seconds


Regards,