Support: Jetpack not working!

Hi everybody!
I have windows vista home ed., with IC2 1.70, build craft 3.X and other little mod such as toomanyitem installed...
The problem is that if i use a standard jetpack , it works perfectly, i go up and i die if i go down as normal , BUT, if i equip the Electic jetpack , it simply dosen't works! I hold normally the spacebar (to jump) as normal jetpack, but i simply jump in position... i'm sure it was charged, and i try to press H for see if the hover mode change something, but nothing...
Have u any ideas of why it don't bring me to the sky?
Tnx a lot

Quote from RichardG

The mode key is now M

Thanx for your answer!
mmmhhh u right... the right button is M, and i can switch the hover mode unless i continue to jump... but the problem is not solved... i cannot leave the ground... i simply perform normal jump, hover on or not...

Quote from Alblaka

Are you located on a mountain or raised terrain?
Jetpacks have height limits, Electric one doesnt do much above layer 90ish.

I wasn't over layer 90th, but i found out why it doesn't works!
I used the switch of creative-survival from toomanyitems to create-equip the jetpack.
What i've done is this:
1. create a new world in creative
2. pick up a new into original the minecraft interface (not from toomanyitems)
3. switch to survaival mode
4. equip the
5. try to jump over and over...
BUT! There is a trap! I thinked it was charged because it's fuel bar seems full, but if u charge it with any source of elettricity as normal, the bar resets like it's empty, and start charge untill full charge. THAN it works! I now can fly perfectly!

In short, at the creation, it's out of energy, even if it's seems full and ready to fly...