Only one app does not sync

[serhito]

3 weeks ago, I downloaded an app on my daughter's touch. Used it, works great.
Few days ago, I bought a touch and wanted to install the same app. Apparently it is not available for US customers anymore.
So I thought I'd be smart and just transfer it from her ipod to mine. The app is installed on her ipod and I can use it, but it's nowhere to be found on the device when it's time to transfer. I tried a phone browser, but it's the only app missing. How come ? How can it be installed, but can't be seen with a phone browser ?

Any idea ?

Thanks.

 

[celticpride678]

The device has to be authorized to the iTunes account where the app was purchased from. Is it?

 

[thelordnyax]

The device has to be authorized to the iTunes account where the app was purchased from. Is it?

if you plug the iPod Touch into iTunes and "Transfer Purchases" does it not copy it from the iPod into iTunes?

 

[serhito]

if you plug the iPod Touch into iTunes and "Transfer Purchases" does it not copy it from the iPod into iTunes?

That's what's weird. I did all that. Authorized and Transfer.
It transfers everything else but that app.
If I am in iTunes and go under apps, right click to show in finder or explorer, I will see all the apps installed, but this one is not there.
It's hidden somewhere on the device.