Since there is no edit options here, I just did a search and found out that all the non-modern drivers are not listed (
http://docs.info.apple.com/article.html?artnum=301175#lexmarkdrivers) in the pull down menu, however the note said "3. Drivers that are not denoted as Modern Drivers cannot be selected when adding an IP printer or Windows shared printer." This is neither an IP printer nor a Windows shared printer, the printer is directly connect to my MacBook's USB port.
Any help would be appreciated.
Thanks.
EDIT: Well apparently there is an edit option but I can't edit my original post for some reason.