Key Press Not Responding If You Go Back (re-do step)

Question

I have a software simulation in which one of the steps is to enter some numbers into a text field and press the Enter key. Works good on the first pass. If you then click the Back button and go back to a previous step the Enter key will no longer work. I have search the forums and some blogs without any luck.
Example:
http://elearning.biworldwide.com/misc/Soft_Sim/Soft_Sim.htm
After you reach the text entry step and enter the correct numbers and press Enter, click the Back button (lower left) and back up to the Click Member step and re-preform the steps. When you reach the text entry the Enter key press will no longer work.
Source CP4 file:
http://elearning.biworldwide.com/misc/Soft_Sim/Soft_Sim.zip
Thanks for any assistance,
Kevinhttp://elearning.biworldwide.com/misc/Soft_Sim/Soft_Sim.htm

Answer 1

All apps in the recently used apps bar or dock which is accessed by pressing the home button twice are not loaded and running. Some apps like games that have been updated to do so will be in an idle state, most will be quit, and some will run in the background when leaving the app. The number of apps that can run in the background are very few and far between because there is no reason or benefit for the overwhelming number of 3rd party apps to run in the background.
http://whenwillapple.com/blog/2010/04/19/iphone-os-4-multitasking-explained-agai n/