Thanks for your replies.
When I place the warlock.mdl in the level it cycles through its animation. My model does not. When I give my model the AIFPS01 Guard action, it perfoms the standing animation, but as soon as it spots the player it moves towards the player gliding along the floor but with no animation. As I said, everything worked perfectly in v6.3.
I am using templates so not using ent_animate directly.