callsign changed!

[BD4BTB]

hi,recently my callsign has been changed since upgrade.
my old callsign is BG4BTB,and now i want to change it with BD4BTB.
how can i change it ?i have looking for several times on website of QRZ.COM,but not success.

pls help me ,thanks a lot!

[NF2C]

Change has been made.........
73, Chris NF2C http://www.qrz.com/iB_html/non-cgi/emoticons/smile.gif