How can i import large excel sheet in Xcelsius ?

Am working with Xcelsius 2008 SP 5 and Excel 2007 and i want to import the excel sheet that have 325732 row .
when i import the excel sheet , it reduce the spreadsheet to the maximum rows in Excel 2003 which is 65536 row ... Any idea how to import all the rows in Xcelsius 2008 Or i have to install the new Xcelsius