Shhould I take another Ielts exam for Canadian Immigration?

I am planning to submit an application in ONtario. The requirement said:

You meet the language fluency requirement if you are registered and have practised nursing in one of the following countries* in the last five years: USA one of them-------- since I've been working in Texas for almost two years I thought I'm included in this section already? Do they really mean the whole five years? haha

With Canadian Immigration:

At the time of submission of your application to a Visa Office, you will need to:
• submit language test results from a designated testing agency or
• establish your proficiency through a written explanation and supporting documentation. CIC strongly advises that you provide the results of a language test if English or French is not your first language. Written submissions are only recommended for applicants whose first language is English or French. ---- Since I'm here in USA taking care of patients who only speak English I thought i can just submit written documentation of my work experience plus my 2007 Ielts exam.

So what do you think should I do? I mean if I have to submit ielts academic for college of ontario, then general training for immigration? I cannot take both, what will happen to my wallet LOL, or can I just take Ielts academic and explain it to Immigration? This is what I really want to do though, peace for my mind and my wallet: I can just both send written documentation that I passed it before and just send supporting documents? Thank you for your help.

Ok, I'll call CIC for that, but what is your understanding of this:

You meet the language fluency requirement if you are registered and have practised nursing in one of the following countries* in the last five years: USA one of them-------- since I've been working in Texas for almost two years I thought I'm included in this section already? So basically I don't need to take the IELTS exam for CNO. Anyway, I emailed them already since its Saturday. Thank you again.