LaserSoft Imaging

This problem involves trying to scan color negatives .
First my specs:
Imac
OS 8.6
Photoshop Elements +/or Photoshop 6.0
Epson 2450 scanner USB.
Reflective scans are great, this is a problem only with transparency(color negatives) scans.
Now my troubles:
Version SF E-5.5.0r07(Epson-SE) which came bundled with the scanner would provide beautiful pre-scans & previews but scanning into Photoshop I got horizontal white lines in 1-4 places across the photo & those lines varied in thickness & also where they showed up each time I did a final scan. I searched for answers on your website & found an update which I downloaded...SFE-5.5.1r03 (Epson-SE). With the old version removed & the new version installed, the first scan into Photoshop looked great. The second scan & every one after that have been purple. Again, the pre-scan looks good but it is purple as it is scanning & opens up purple in Photoshop.
Note: The white lines were only visible in the finished scan. The purple can be seen during the progress bar as well as in the finished scan opened in Photoshop. As a further test I downloaded the AI demo & it works beautifully.
Any ideas?
Thanks.

Dear Johnny,

I just tested it here here and did not run into any problems. However, there is one thing you should be aware of: When scanning, the SilverFast- settings are carried over to the next image. So if the colors in the first image were accurate, and all following images were purple, it might me that a setting from the first scanned image got carried over. To avoid this, please click the small red trashcan- symbol in the pre-scan window before you do the next scan. This resets the program and should get you accurate colors for the next scan.