problem uploading image for product with ecommerce plugin

Hi,

I am using the ecommerce plugin and trying to upload an image for one of the products in the store.

In product images- I click on ‘select files’.
The image then appears below in a list of images, where it says ‘ manage your thumbnails’.

However, when I click on ‘edit product’ – the image does not appear with the product in the store.

any ideas as to what I might be doing wrong – would be much appreciated,

thanks