I have the same issue as described in this topic: http://community.wdc.com/t5/My-Book-Live/error-1244-when-attempting-remote-access/td-p/346069
Whenever I try to open any share in WD2GO, I get only Error message 1244 informing about failed authentification.
Solution suggested there doesn’t work. I also don’t seem to encounter any browser info regarding the invalid certificate.