Nepali fan,
Paper file joint return (married filing jointly) to IRS. Also, fill out form W-7 to get ITIN for your spouse.
http://www.itin-gov.us/ITIN/Index?gclid=CJTmwI6k_bwCFYtDMgodAz0AAA

Please follow following link for better understanding.

http://askville.amazon.com/married-husband-doesnt-SSN-file-taxes-single/AnswerViewer.do?requestId=89247353