EAD card gone back to INS due to post office

My EAD was approved on 2/1/02 and i was waiting to receive my card and yesterday i heard message that due to undelivarable by postoffice it went back to INS and please update your address on same address my husband got his EAD and AP (For both)from INS on 4thfeb please guide me now what should i do now ?i am so disappointed
 
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