i-485 approved or not

several weeks ago, i check my case in USCIS and found the following the result:


Application Type: I485, Application to Register Permanent Residence or to Adjust Status

Current Status:

On xx, xx, 2005, the document we made based on the approval or registration of this case was mailed directly to the person to whom issued.

但一直到现在没有收到任何信, 我call USCIS, 说我的case还没有批在她的computer system, 需等. It is s weird. my case has been waiting for 1.5 years. 下一步我该这么办? 请各位大侠帮小妹一下!! I appreciate it!