app development is over, also attached to the jailbreak iphone 3gs, the 0755 property is also checked, a little icon to start the program flashed gone.

app development is over, also attached to the jailbreak iphone 3gs, the 0755 property is also checked, a little icon to start the program flashed gone, I ask this is what causes?
Reply:
This means you have successfully jailbroken your app in question, specifically what the problem is, it is best to line debugging. For example, you call a function that is not defined. If you can not line debugging, please put the project clean look, and then compile, and see those warning.
Reply:
After this case 99% is caused by the installation is not signed,
ldid-S [filename of your program]
Try, good luck!