How i can use aspera services in kaltura using kaltura api

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I am trying to use aspera service but i am getting an error service forbidden faspurl
i am pasting the code which i am using please help me on this.
and please do tell me how to ulpload using aspera.

KalturaConfiguration config = new KalturaConfiguration();
config.setEndpoint(“http:\www.kaltura.com”);
config.setPartnerId(1599881);
KalturaClient client = new KalturaClient(config);

	String s=client.getAsperaService().getFaspUrl(flavorAssetId);
	System.out.println(s);
	client.isMultiRequest();