XIAO BAI DU 751 cant check one the line?? 没没没没2006-02-22 06:12:29

how do i check 751case on the line, i tried put my number, they couldn't find it. i went to office , they siad same thing. i called them, they send me mail.
do you how how to check my case on the line.
thx

write to USCIS service center to report it,they'll