question about signaltap ii

hi,all:

......

input [2:0]tcm1_stat;

input clk;

output alm:

wire alm;

assign alm=(tcm1_stat==3'b101)?1:0

......

why i capture the alm=1 with the signaltap II,but i can't capture the tcm1_stat=3'b101,i am confused.

ps:clk is a global clock,168.04MHz.