Matlab error in mac osX maveriks

Hi guys,

I am trying to use matlab 2013a in my mac osX maveriks (the last version), and I have Excel 2011 for mac (fully updated). I have an script with this line:

pvini=xlsread('dataaero.xlsx',aero,'g3','basic');

when I call the script matlab throw this error:

Error using xlsread (line 247) Worksheet 'e48' not found.

Error in final (line 5) potenciagen=xlsread('dataaero.xlsx',aero,'d2:d26','basic');

I read how to use xls read on mac but I am unable, can any one help me??