You need to call SERVICE Center ...

To make sure the remand sent to the right address... otherwise, you have to ask them to send it again to your current address or your lawyer's address.

My RFE letter sent out on FEB/29 and I didn't get it untill this monday, so I called NSC and a nice IO lady told me the letter was sent to my old lawyer who my company has terminated business contract with.... after I explained the situation to the IO, she immediately hitted the button to generate another letter sending directly to me. On tuesday, my online status confirmed she did help me this... I am pending for the RFE letter now...

So you need to call them asap...