What you have to do is start the process over. Sometimes the Ethernet doesn't have a good connection. Make sure both ps3's are off then connect them together.
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Notices
* When you perform this operation, all data that is stored on the PS3™ system that will receive the data (the "destination system”

will be deleted.
* Deleted data cannot be restored, so be careful not to accidentally delete important data. Data loss or corruption is the responsibility of the user.
* Some types of data may not be transferable. Select here for details.
Settings > System Settings > Data Transfer Utility
Data Transfer Utility
You can now transfer (copy or move) data that is saved on one PS3™ system's hard disk to another PS3™ system's hard disk using an Ethernet cable.
Notices
* When you perform this operation, all data that is stored on the PS3™ system that will receive the data (the "destination system”

will be deleted.
* Deleted data cannot be restored, so be careful not to accidentally delete important data. Data loss or corruption is the responsibility of the user.
* Some types of data may not be transferrable. Select here for details.
Preparing the systems to transfer data
Before starting the data transfer operation, you must perform the following steps.
1.
Update the system software of both PS3™ systems to the latest version.
2.
Prepare the PS3™ system that will send the data (the “source system”

.
If multiple users exist on the source PS3™ system, you must perform the following operations for all of the users before starting the data transfer operation.
* Create a PlayStation®Network account if a user does not have an account.
* - Select (PlayStation®Network) > (Sign Up for PlayStation®Network), and then follow the on-screen instructions to create an account.
* Deactivate the PS3™ system if the data to be transferred contains content that was purchased from PlayStation®Store.
* - Select (PlayStation®Network) > (Account Management) > (System Activation).
* Back up, or "sync", trophy information on the PS3™ system with the PlayStation®Network server if you want to transfer trophy information.
* - Sign in to PlayStation®Network, and then select (Game) > (Trophy Collection).
* Sign in to (PlayStation®Home) before transferring the data if you have obtained reward items for use in (PlayStation®Home) on the source system.
* Back up your profile information and stages you created in LittleBigPlanet™ to your saved game. You can then use the data that was backed up when playing LittleBigPlanet™ on the destination PS3™ system.