InfoPath Dev

it will only let me use vbscript or jscript

That code was accepted without errors in script editor but then when i tried to preview the page it came up with "InfoPath cannot create a new, blank form. The form template is not valid" When clicking on the more info button it comes up with  "InfoPath cannot open the selected form because of an error in the form's ...

Tried that formula and it just said formula contains one or more errors

I would like to have an autonumber field in my form that is in the format of year/month/day/time to create a unique number for every form that is completed, can anyone help me out with this?