Hi,
You are sure that you have enabled the
Dynamic Thumbnail Resizing option. Right?
Recreating thumbnails is related to Virtuemart core and has nothing to do with our template. Virtuemart uses "dynamic thumbnail creation" feature of PHP. If there is a conflict on your server, and your server doesn't support those functions. Virtuemart will fail to re-generate the missing thumbnails. I am afraid there is nothing can be done about it. No one can you help you except your hosting server provider customer support.
I would recommend you to move your Joomla website to your localhost (with AkeebaBackup Component), then visit the front-end and you will see that Virtuemart will generate all thumbnails with the new dimensions in the /resized/ folder. (Because all localhost has the necessary functions to let Virtuemart check/regenerate thumbnails.)
Then, see this folder in your localhost:
LOCAL_HOST/images/stories/virtuemart/product/resized/
and upload that folder to your live server to here:
YOURDOMAIN.COM/images/stories/virtuemart/product/resized/
For more info about changing the thumbnail resolution, look at these topic:
forum.virtuemart.net/index.php?topic=93019.0
forum.virtuemart.net/index.php?topic=47301.0
forum.virtuemart.net/index.php?topic=93505.0
forum.virtuemart.net/index.php?topic=112025.0
(use google.com to find more articles about this topic)
Regards,
Support