Hi Deepa,
In DS 4.1, datetime2 (SQL Server 2008) datatype should convert to datetime. So what you see shouldn't happen, unless it has been manually changed.
Does it happen with any datatime2 filed?
If you create a new column in a test table in sqlserver and import it in DS, do you have a problem still?
As a temporary workaround can you change this type manually for your field by opening the table in the datastore in DS designer, double click on the type of the wanted column and change it to datatime.
thanks