SSIS AND XLSM load time issue Visual Studio 2010

I am having the following issue of SSIS AND XLSM load time issue Visual Studio 2010 I want to speed this up I am reading a .xlsm as my excel source I have noticed its loading / reading every row of the excel...even though they are blank e.g I only have 300 + rows of data at the moment, but it loading every row even though they are blank e.g going pass the 400 row where there is no data yet I don't want it reading 200,000+ rows before it actually loads the 300 how do I stop this please team