You didn't say when you're trying to make them for, but at this time you can't do 2008 on the website. It's a little misleading because it does show it as an option for date-picking, but because the rates haven't been released so it kicks you back to the beginning.
I had the same issue.. You are better off just calling 1407WDISNEY and asking them for prices and to book..Its alot easier than using the disney website..IMO its way to slow!!!! even when it is working fine