If you missed the original deadline to Answer the Amended Complaint then you need to file a Motion For Leave to File Answer and Affirmative Defenses to the Amended Complaint. If the deadline has not expired since the Plaintiff filed their Amended Complaint, then you don't need leave of Court to Answer, just file your Answer. Summary Judgment can be tricky because you have to file your proof in support of, or proof in opposition to the Motion and do it by certain time deadlines set forth in the Rules of Civil Procedure. If ther is any way you can afford it, you should consult with an attorney to help you.