PHP API - reblogPost not working

[tmcyrix]

Hello together,

I've been working with your Tumblr PHP API for a few months now.
So far, however, does not work the following function:
reblogPost($blogname, $id, $reblog_key)

All specified parameters match, but always receive the following error message:

PHP Fatal error:  Uncaught Tumblr\\API\\RequestException: [400]: Bad
Request\n\n  thrown in /path/to/lib/Tumblr/API/

Client.php on line 427

Hope you could help me. Thanks.

Best regards
tmcyrix