Frustrated by Gravity: Solving an Energy Conservation Problem

[mawalker]

grrr... gravity

A rocket is launched straight up from the Earth's surface at a speed of 1.90×104 . What is its speed when it is very far away from the earth?
plugging everything into the energy conservation theorem i came up with the exact same speed... I'm not sure what I'm doing wrong.

 

[berkeman]

What are your units? Show us the work you've done so far so we can help.