Custom field image default list not working

[brsi]

Hi, when trying to build a default list of custom field images using the images names in VM, there is no link to the actual images.
Any hint on that?
Thanks.
J2.5.20 with VM 2.6.4

[Milbo]

Please post the configuration of your customfield, best as screenshot

[brsi]

The setup is as follows (I don't seem to succeed at loading an image here):
Custom field type: image
Cart attribute: yes
Default: unique image names (as found in VM media list) seperated by a semi-colon
Is a list: yes

Now if I set 'is a list' to no, and do not enter any default value, then I can select images but have to choose amongst all VM media; when setting 'is a list' to yes and specifying default image names, then I get the correct dropdown list but the selected images do not display in the prodcut detail view.
Could it be linked to an image folder location problem?

[Milbo]

Why is ist a cartattribute? I think you should disable this.