SUM And PERIODSTODATE Issues! Please Help Me!!!

I have a cube built on a single table. This table has a record for each employee. The record contains various information, but I am interested in tunrover. So i am using the start_date, finish_date, cc_descr (cost centre the employee belongs to) and full_name (employees name) fields.



I've broken down these fields with named calculations.

FiscalStartYear, FiscalStartMonth, etc. by using DATEPART(year,DATEADD(month,-3,start_date)), etc. (Fiscal year starts 1st of April). These are then used to create a 'time dimension' called 'StartDate' and within the time dimension is a hierarchy (Called 'FiscalStart', members - FiscalStartYear>cc_descr>full_name.



Every year since the business started a certain ammount of people joined during that year. At this stage all I want to do is have an accumulated total of staff (ignore staff leaving for the moment).



Currently the cube has an 'All Count' measure which is simply a count of all the available rows in the table.



So I'm trying to create a calculation to accumulate the staff 'joins'.

I'm using:



SUM(PERIODSTODATE( [StartDate].[FiscalStart].[Fiscal Start Year],

[StartDate].[FiscalStart].CurrentMember),

[Measures].[All Count])



This isn't achieving what i need! It is accumulating the total's WITHIN the years by cost centre, but I need it accumulated year by year!



I need:

YEAR | AmmountStarted | Cumulative Count

1996 1 1

1997 1 2

1998 4 6

etc...



I'm getting:



YEAR | Cost Centre | AmmountStarted | Cumulative Count

1996 1 1

1997 1 1

1998 XYZ 1 1

ABC 2 3

DEF 1 4

TOTAL 4 4



How do I fix this!?!?!?!



Anything else you need to know? Just ask!



Many thanks in advance,

Karl