how can i get a work permit in canada for acting when?

Posted January 12th, 2011 by immigratecanada and filed in Immigration to Canada

it says i have to have proof of employment:
Your job offer letter or contract from your prospective employer, and the file number provided by Human Resources and Social Development Canada (HRSDC) to locate the labour market opinion (confirmation). Your employer should be able to provide you with this file identifier;

when i dont? so far they just told me that if i can legally work there, then i have an interview. How do i go about this?