[twitter-dev] About for 2 hours, No list returned.

I'm using twitter4j.

twitter.getUserLists("castnode", -1) returned Null.

And i checked this url : https://api.twitter.com/1/castnode/lists.xml?cursor=-1

Result is this :

<?xml version="1.0" encoding="UTF-8"?>
<lists_list>
<lists type="array">
</lists>
<next_cursor>0</next_cursor>
<previous_cursor>0</previous_cursor>
</lists_list>

What's happend and what should i do..??

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