Because they forgot about that part of the Constitution where bills can't become laws if the Senate doesn't do anything. And the Senate hasn't done anything. Fail.
Here are the screencaps:
House Republicans, you may recall, have pledged to cite the constitutional basis for all of their legislative initiatives in the text of their own bills. They're 0-for-2 on that score. The health care law was introduced without a citation of constitutional authority. And their other accomplishment -- a bill to reduce printing waste on Capitol Hill -- cited Article 1, Section 5, which holds that "Each House may determine the Rules of its Proceedings."
Except as David Waldman notes, the bill isn't a rule change. It's statutory.