Change Starting Year in Association Mode

Hello everyone and to our Master's, i need a little help for my association.
I'm using the roster from Medevenx Post draft with the complete Players Stats, Teams stats, Awards, etc.. from the previous year 2012-13.
I want to start my association in the year 2013-14. how can i change the starting year?

I'm hoping guy's for your positive response.
Thanks in advance.

I don't believe there's any way to do that.

Thanks sir andrew for your response. i hope someone could try out if it is possible to change that.

thats not possible bro.!