Binomial Expansion on Mathematica

Why when I typed Expand(Binomial(m-1,6)), it gives me Binomial(-1 + m, 6) instead of 1/720 (m-6)(m-5)(m-4)(m-3)(m-2)(m-1) ? I want my output to be like the second one, is there any other command that I need to use? Thank you.