date data extration problem in SSIS

Hi All,
I have excel file and having field structure like below
File:
[Brand] [varchar](200) NULL,
[Pack] [varchar](200) NULL,
[Manufacturer] [varchar](200) NULL,
[Division] [varchar](200) NULL,
[ATC1] [varchar](200) NULL,
[ATC2] [varchar](200) NULL,
[ATC3] [varchar](200) NULL,
[ATC4] [varchar](200) NULL,
CU Month/6/2010,
CU Month/7/2010,
CU Month/8/2010 ,
R Month/6/2010,
R Month/7/2010, 
R Month/8/2010 ,
UN Month/6/2010,
UN Month/7/2010,
UN Month/8/2010

i Have   UNPIVOTED this put it in a table 

Table:[CalendarDate] [varchar](50) NULL,
[MapTime] [varchar](200) NULL,
[MapValue] [varchar](200) NULL,
[Brand] [varchar](200) NULL,
[Pack] [varchar](200) NULL,
[Manufacturer] [varchar](200) NULL,
[Division] [varchar](200) NULL,
[ATC1] [varchar](200) NULL,
[ATC2] [varchar](200) NULL,
[ATC3] [varchar](200) NULL,
[ATC4] [varchar](200) NULL,
[Measure] [varchar](200) NULL

in [measure] Column i have  put 
CU Month/6/2010,
CU Month/7/2010,
CU Month/8/2010 ,
R Month/6/2010,
R Month/7/2010, 
R Month/8/2010 ,
UN Month/6/2010,
UN Month/7/2010,
UN Month/8/2010 

column's data with 

SUBSTRING(LTRIM(MapValue),1,2) == "CU%" ? "CUnits" : (SUBSTRING(LTRIM(MapValue),1,2) == "UN" ? "Units" : (SUBSTRING(LTRIM(MapValue),1,2) == "R " ? "Value" : NULL(DT_WSTR,5)))
SUBSTRING(LTRIM(MapValue),1,1) == "R" ? "02" + SUBSTRING(LTRIM(MapValue),8,8) : "02" + SUBSTRING(LTRIM(MapValue),9,8)
 condision 
But problem is [CalendarDate] data is showing like 01 rather than
 01/8/2010 formate and in [Measure] column data is NULL.
Can anyone suggest how to do it?

Thanks