TSC 在干什么

去年 9月份file的140，到现在还没approve，最近收到这样的信，不知发生什么了。
有什么办法催以下

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.