Rachel:

When you open the Import template and click on the "Field Defaults" tab, you will see the "Fiscal Year" on the right-hand side under "Defaulted fields".

When you select "Fiscal Year" then look at the "Value" field below, it should be a drop-down box. Which fiscal years appear there? You should see 2010, 2009 and any earlier fields which exist in your GL.

As Doug pointed out, the version of your Ledger software is important. My answer assumes that you are using 9.0A or 9.0B.