Hi,
As i am seeing your website has jQuery conflict error. (because of loading multiple jQuery libraries in the same page)
Those console errors must be resolved first, the problem of not changing the "add to cart" button to "notify button" must be related to that.
Attachment Pasted_Image_4_15_14__10_53_PM.png not found
Your website is loading jQuery already by K2 Component, so loading an additional query library through Virtuemart component is unnecessary.
Try this:
- Open
VM Configuration >> Template
and do this change:
Attachment Pasted_Image_4_15_14__10_56_PM.png not found
Then see if those conflict errors are gone.
Regards,
Support