The older free Webservice is no more working and hence, a new version with a new Webservice.
Make sure to set the TIV version to 1800 or later where SOAP functions are supported.
(The last version was uploaded exactly 4 years back - 13th June 2013)
The new webservice offer's an option to put the Rate Date
Unless you try to do something beyond what you have already mastered, you will never grow!