LocationService V5 throws an error

Hi!

Can anybody help me with new services on sandbox?
When I call LocationService.getAccountLocation() with appropriate credentials the APT Sandbox returns an error:

{http://apt.yahooapis.com/V5}ApiFault:<yns:code>E1052</yns:code><yns:message>Wrong namespace for service.</yns:message>

service URL: https://sandbox.apt.yahooapis.com/services/...LocationService
Namespace: http://apt.yahooapis.com/V5