TSC 在幹什麽

去年 9月份file的140，到現在還沒approve，最近收到這樣的信，不知發生什麽了。
有什麽辦法催以下

the following is the latest information on your case status

Receipt Number: WAC0600150660

Application Type: I140 , IMMIGRANT PETITION FOR ALIEN WORKER

Current Status:

On March 29, 2006, your I140 IMMIGRANT PETITION FOR ALIEN WORKER was
received here for processing. It is taking between 400 and 450 days for
us to process this kind of case. We will mail you a decision as soon as
processing is complete.