Multiple sheets in excel 2007

 Until last week I was able to select 11 worksheets on a excel datafile and print to PDF and have all 11 sheets appear in the resulting PDF file. Today it is splitting the the print job into 4 pdfs with 2 to 3 pages each. If I choose the wait collect function it takes me to the PRF Printer monitor where I can choose the combine button. Is there a way to have it default to this option.