Space Shuttle issues. Hoping to get some help

[mrx89_07]

So I'm trying to build a space shuttle that resembles the one we all know and love, and I had some success building a stable glider and accomplishing vertical takeoff. However, Once I get in the upper atmosphere my shuttle basically spins out of control and I have to decouple all my engines and In order to be able to sit the plane down without crashing. I was hoping I could post my craft file and maybe get some ideas on what I could do to get this thing into orbit. Any suggestions would be great.

Here's a link to my craft file:

https://www.dropbox.com/s/n3t6q5ypoj13860/Shuttle%20V5.craft

(BTW its actually a space plane so you should probably put in your space plane hangar folder)