This is a legitimate point of order and there's a legitimate answer to it. Senate Rule 16-4(3) states:
Officers or employees of the Senate shall comply with the decision of the Senate, in response to a message from the Commons, as to whether they should attend before the House of Commons, appear before one of its committees or provide answers, either in writing or through counsel. Without such approval of the Senate, no officer or other employee of the Senate shall attend before the Commons or appear before one of its committees.
Such is the world you live in, Mr. Ravignat, whether you like it or not.