Yahoo not listing Calendars

[rashnk]

yahoo works on local server, i can list the calendar list and events, but if i upload to server, there it does not return the list, it connects and returns 200 staus, but findCalendars function not returning calendar list
url : https://caldav.calendar.yahoo.com/dav/username/Calendar/calendar_name/
i checkd the cURL configuration on local and server, there is difference for 3 values, as below

server

GSS-Negotiate No
SPNEGO Yes
TLS-SRP No

local

GSS-Negotiate YES
SPNEGO No
TLS-SRP YES

all except these value are same, any fix can u suggest ?