Previous employer owes me a mth's pay but i think she has changed her business name will it make a difference?

I have filed a claim with the Labour Board but since I am self employeed with her they might not accept it. I will have to sue her. would it matter if she changed her business name with the Labour Board or the court? The actions done by her have put me in alot of debt as she put a stop pymt on my chq and the next two she gave me came back NSF. Does anyone know any Ontario Laws about this? Thanks in advance!