My mother-in-law (85) won't wear her life alert or walk with her walker, what can we do to make her realize she needs both?

This may be to simplistic of an answer - but for reasons all her own my mother would not wear the pendent style alert button. My dad wore the bracelet style. Dad misplaced his so we put the pendent on him. When the bracelet turned up mom began to wear it. As she changed residence a few times it was always the same - no necklace but okay on the bracelet so it definitely was a matter of preference.