我的情况如下：NIW-140，2003年3月， APPROVE 2005年3月
I-485， 2004年3月22日。STILL PENDING
我是单身妈妈，一个孩子，写过信让议员帮忙，没有回复，也不知他们有没有帮忙，
给希那利都谢过，我和孩子还给NSC的FBI写过信，也没音信，当初递485时(NSC)，我在威斯康星，140批准后，我和孩子搬到纽约州。
以下是我电话后，移民局的答复：
The status of this service request is:
The processing of your case has been delayed. A check of our records establishes that your case is not yet ready for decision, as the required investigation into your background remains open.
Until the background investigation is completed, we cannot move forward on your case. These background checks are required to be completed on all applicants who apply for the immigration benefit you are seeking. We will make every effort to make a decision on this case as soon as the background checks are complete. If you do not receive a decision or other notice of action from us within 6 months of this letter, please contact us by calling our customer service number provided below.
我想WOM？但不知怎么做?
请大家帮我出出主意，先谢谢大家！！！