Issue in changing the Validity in Factory calender in Solman (SCAL). Any ideas?

Hi,

I am trying to create a new factory calender in SCAL.

I am unable to change the validity as i encounter the error: "Please enter validity between 1995 - 2010"

I would require a validity between 2014 - 2050.

Also what should i enter as Factory Date Start?

Please check the 2 attachments.

Thanks.