Company owner says I shouldn’t put up the new NLRB union poster…Should I?

Q. I am an HR Manager for a company in Ohio. I know about the new posting that we are supposed to do on Nov. 14, 2011 notifying employees of their rights to unionize, but the owner of the company called me and told me to do not post this in our plant. I told him that it is federal law and that we must post. What am I to do since he is the owner and I must listen to what he tells me to do even though I know that it is wrong? -- Gary, Ohio