This response is not legal jargon.
The plaintiff says that the defendant has made a motion that does not set forth a proper basis for the relief the motion sought. That statement is plain, clear and has no ambiguity.
It would help to know what the affidavit is, how it was offered to the court, and what your motion said. There are certain items to attack in an affidavit, and your questions is rather vague about what is being discussed in the motions.
I assume you have filed a motion to strike the Plaintiff's affidavit, and this is the response. You are well advised to get legal counsel on this case, if you cannot settle it yourself.