Temporary Resident permit is not included in the Global Case Management System (GCMS) Released on December 15, 2012. Read the relevant portions of the bulletin 486
"With the deployment of the Global Case Management System (GCMS) Release 4.0 for e-Apps on December 15, 2012, applicants for Temporary Resident Visas, Visitor Extensions, Study and Work Permits, whether they are in Canada or abroad, will be able to submit their applications electronically. Applicants will be able to pay online, submit their applications online and upload their supporting documents. Applicants for other lines of business such as permanent residence, permanent resident travel documents and temporary resident permits, are not eligible to apply online at this time"
http://www.cic.gc.ca/english/resources/manuals/bulletins/2012/ob486.asp.