Je vais transférer votre question dans le forum d'After Effects, parce que vous l'avez mis dans le forum de Captivate.
When you imported your Photoshop file you left import as a sequence checked so all consecutively numbered photoshop files in the folder are imported as a sequence (movie).
For the Grow Bounds problem you need to check the installer and the folders where this plug-in is stored. I'd run the uninstaller if you have it, then re-install Grow Bounds.
If you have applied layer styles in Photoshop, You should flatten the images. Certain Photoshop layer styles do not work in After Effects.
Your description makes me think that you want to make an Image sequence. Is this true? If it is, all the photoshop images should be in ONE folder, with sequential numbers added to the file names. For example: "Filename0001.psd", "Filename0002.psd", and so forth.
You should also ask the people at Red Giant Software about your plugin problem.