用SAS连接WRDS，一直显示失败。用的是英文版的SAS9.4，不知道为什么会这样。求帮助，求指点~
用的代码就是网上查的，谢谢大家。
%let wrds = wrds.wharton.upenn.edu 4016;
options comamid=TCP remote=WRDS;
signon username=_prompt_;

ERROR: A communication subsystem partner link setup request failure has occurred.
ERROR: Communication request rejected by partner: security verification failure.
ERROR: Remote signon to WRDS canceled.