I'll select the answer, but I want to add some clarity to it. The reason the stats don't appear to change at level 1 is that the amount of EVs required for a stat change is very high at level 1. As the Pokemon levels up, its stats will be recalculated, and the EVs will have a larger nominal (but not proportional) effect, as the number of EVs required for 1 extra stat point decreases relative to level.
EVs always contribute roughly the same proportion of your Pokemon's stats, assuming level is the only variable that is changing. At level 1, the stat numbers are small; and combined with rounding, that can make it feel like the EVs are doing nothing. But they are there, and they will have their intended effect.