Question : CASE....WHEN USING A DATE COMPARISON

I would like to create a column in an SQL Server query that produces a text result based on the comparions of a date in another field. My query looks like this :

SELECT     ACCOUNT_ID, ACCOUNT_YEAR, FILED_DATE,
  (CASE FILED_DATE
          WHEN >= CDATE(12/31/2100) THEN 'KEYED'
          WHEN < CDATE(12/31/2000) THEN 'WEB'
          END) AS AUDIT_STATUS
FROM         ppAuditPartIa

And of course it doesn't work..syntax error near '>'

Answer : CASE....WHEN USING A DATE COMPARISON

SELECT     ACCOUNT_ID, ACCOUNT_YEAR, FILED_DATE,
  (CASE
          WHEN FILED_DATE >= '12/31/2100' THEN 'KEYED'
          WHEN FILED_DATE < '12/31/2000' THEN 'WEB'
          END) AS AUDIT_STATUS
FROM         ppAuditPartIa