|Webservices Enabled ?|
To use VDM or Webservices, SOA component must be installed and configured.
With component for Virtuemart 1 webservices are enabled after installation
With Virtuemart 2 you must enabled webservices after installation (read this).
Check here to see if webservices are enabled
Note : If you have "Internal Server Error" instead of WSDL, check perms on com_vm_soa component directory and set it to 755.
If you don't have access you can also check your .htacess settings. some settings blocks administrator access like :
## Back-end protection