having issues with one particular app

     This is really annoying. I downloaded Scanner Pro a while ago, and am trying to get it synced back onto my phone. The problem began last night when I plugged my phone into the computer to update a playlist. ITunes complained it couldn't read the contents of my phone so I had to restore it. I did that and it complained that the computer wasn't authorized to run one or more of my apps. Since it was very late last night, I decided to put it asside and pick it back up today. Sync apps was checked on the summary tab of the phone, but none of the apps were syncing. I went to the apps tab and checked the first several apps. Scanner Pro was the 10th app on the list of aapps. The first 9 went without a hitch, and the last several appear to be going smoothly as well. However, when I check the box for Scanner Pro, ITunes freezes, and the only way that seems to work to get it unfrozen is to disconnect the phone. Note I haven't applied the settings yet so no data is being transfered through the cable yet. How can I get this app to copy to the phone?