Fantastic Voyage - Charater rig (minor problem)

I finally finish rigging my main character but ran into and slight problem. everything seen to be working fine until I start to move the character around, for some reason the rig doesn't move as far as the model (last image)

Fantastic Voyage - All assets

Quick Playblast of all the assets together

Still Render of all the assets

Fantastic Voyage - Bump map texturing

fantastic Voyage - Productions schedule

In all of my previous projects, I've let my self down by not managing my to properly so as I'm now moving from pre-production into production its important that i get everything done when it need to be one. Hopefully I can i can stick to this schedule.

Fantastic Voyage - Schedule sheet and time table

Fantastic Voyage - Symthesis & Mitotic machine - thumbnails

I want the overall shape to look simple but I didn't want them to be just boxes.

Fantastic Voyage - Main Characters 360 view

Fantastic Voyage - Chemobot model

Fantastic Voyage - Cells models