A lesson in Tanya

The one & only time the Chasam Sofer ever quotes from the ספר ליקוטי אמרים*,  known as the תניא is in this week's Parsha (בהעלתך). The Tanya writes, that when a person sins he also drags along and sins with his Neshama the חלק אלוה that is within him.  The Chasam Sofer explains with this the Pasuk of ויבכו גם בני ישראל Not only did the אספסוף the evil part within him sin but also the נשמת ישראל the חלק אלוה sinned. The Chasam Sofer (Shu"t O.Chaim 16) argues on the ספר ליקוטי אמרים The Ch.S. claims that this Sefer is not available in the whole city and even if it would be available he wouldn't have time for it. The Sefer he is referring to is not the Tanya but the ליקוטי אמרים from the Mezritcher Magid.