CurrentDateMember FIRST week of the year issue

Hi,

I am using below syntax to query current week in MDX:

CurrentDateMember([Time.YearWeek],'["Time.YearWeek"]\.[yyyy]\.[ww]')

It was working fine till last week. Since start of first week of 2015, it doesn't give desired result. The above query resolves to below member:

[Time.YearWeek].[2014].[1]

Whereas I was expecting this:

[Time.YearWeek].[2015].[01]


(Changes highlighted in bold)

Do you have some suggestion on how to fix both of these issues.

Thanks in advance,

-Vijay