"You are not authorized to access this page" for JAN14 problems

i m unable to access problems of JAN14. around 4pm i accessed but not now why?? HELP!!

Sometimes they do such things when they are conducting contests(not like LOC/Lunchtime/Cook/Long Challenge)
some which is not availeble to others.

Try it after some time:)

check this out https://discuss.codechef.com/questions/131054/you-are-not-allowed-to-check-this-content