Is one year still too early?..

[Salty]

Maybe its your balance? Just reading the part which said you had thrown them but the didn't connect well. Just throwing it out there but maybe you aren't setting yourself in the right position to throw them, this would explain how your body wont react. Check your feet that your on the ball and not the heels especially your back foot. Also practise using it on a light heavy bag where you can turn and rotate around the bag, in and out so you can simulate this.

Don't know if that helps at all, but was a major hurdle for me when trying to throw a hook after a jab.

[Dizaster]

Maybe its your balance? Just reading the part which said you had thrown them but the didn't connect well. Just throwing it out there but maybe you aren't setting yourself in the right position to throw them, this would explain how your body wont react. Check your feet that your on the ball and not the heels especially your back foot. Also practise using it on a light heavy bag where you can turn and rotate around the bag, in and out so you can simulate this.

Don't know if that helps at all, but was a major hurdle for me when trying to throw a hook after a jab.

That's a great bit of advice... It might be okay throwing them if your not moving around to much,, but moving around, backwards and forwards it a little more to think about, and getting yourself into good balance for a hook or uppercut while moving around might be a little more to think about that your body is ready for, and their is hesitation there or off balance as Salty said.. This is something you could let your trainer know about and have him watch how you set your body to hook or uppercut, and check if you are balanced correctly so that you can throw them quickly and effectively in amonst other combo's and even on their own during other movements.

Even just from more practice though, it'll come together eventually..