Are you using Photos Forever 1.0 build 16
? If not, download that and give it a try.
If you've already got that build or it doesn't help, please submit an Acoustica Support Request
and send us the ph-log.txt file from your Photos Forever folder:
C:\Program Files\Acoustica Photos Forever\ph-log.txt
If you have Windows Vista, click the "Compatibility Files" option in order to reveal the newest log file.