Please don't post the same thread multiple times. It is better to respond to same thread if you are trying to remind others.
On second thoughts, my earlier comment was about CURRENT / LAST job where the obvious reason for not having an experience / reference letter is that you are still working there and haven't shared the details of your plan to quit with your employer because you are not certain when / if you would get visa.
If it is a past job, i am surprised why you don't have an experience letter in the first place. I have never seen it written any where explicitly in CIC's requirements, but i am just speculating that it would at the very least appear odd and would raise a question whether you possess experience / skills relevant to the job you are going for.
May be if you have multiple jobs in your over all profile and you are missing one, it might fly, but if it is a single / primary one, i doubt it would fly.
