Transit visa to Canada

[GermanECU]

Hi there, I got transit visa to come to Canada back in March 2008 and it is valid until March 9,2013. Visa type is R C1. I am flying back to Ecuador next December and I am wondering if I need to get a new Transit visa to go.

The reason why I think I should is because on the Visa there is an annotation that reads: TRANSIT TO CANADA, do I need a visa with annotation TRANSIT TO ECUADOR/CANADA?

Please advise