move to another position with less salary!

hi :

I need to relocate from Business A to Business B due to some organization restructure. I’ve informed my current boss (he is from business B) that the salary package in business A were different than business B and we need to disucss this beofer any decision has made. But my boss seem ignore/forgot about it and contineue to work on my relocation. Now i am in a situation that i will move to business B very soon but will receive less salary package once i move out from business A. What should i do now? Can i say NO to my boss that i don’t want to move?
(Assume Business A will stil keep me if i don’t move to Business B)
tks
richard