REPLACE function in SQL 6.5

Does the replace function not work in SQL 6.5?

Here is what I am trying?

/* Delete existing data */
DELETE FROM DEV_INTERFACES..AFS

INSERT INTO DEV_INTERFACES..AFS
     (name,
     address,
     phone,
     rating,
     officer_name,
     change_amount,
     liab_amount,
     effective_dt,
     maturity_dt,
     log_time,
     obligor,
     entity_type,
     ssn,
     sic)

SELECT  customer.name,
     REPLACE(customer.addr, char(13) + char(10), '!'),
     customer.phone1,
     customer.scf_credit_rating,
     customer.acct_officer,
     liabhist.amt,
     liabhist.total_amt,
     (CASE
          WHEN SUBSTRING(liabhist.postfol_refno, 1, 3) IN('IGT', 'INO', 'IBL', 'ELC', 'IPP') THEN
               (SELECT DISTINCT issue_dt FROM DEV_IBSWIN..lc lc
               WHERE refno = liabhist.postfol_refno)
          WHEN SUBSTRING(liabhist.postfol_refno, 1, 3) IN('OSG', 'OSB', 'PPS', 'OBL', 'IIC') THEN
               (SELECT DISTINCT issue_dt FROM DEV_IBSWIN..standby standby
               WHERE refno = liabhist.postfol_refno)
          WHEN SUBSTRING(liabhist.postfol_refno, 1, 3) IN('BAF', 'BAB', 'DPB') THEN
               (SELECT DISTINCT finance_dt FROM DEV_IBSWIN..finance finance
               WHERE refno = liabhist.postfol_refno)
     END),
     (CASE
          WHEN SUBSTRING(liabhist.postfol_refno, 1, 3) IN('IGT', 'INO', 'IBL', 'ELC', 'IPP') THEN
               (SELECT DISTINCT expiry_dt FROM DEV_IBSWIN..lc lc
               WHERE refno = liabhist.postfol_refno)
          WHEN SUBSTRING(liabhist.postfol_refno, 1, 3) IN('OSG', 'OSB', 'PPS', 'OBL', 'IIC') THEN
               (SELECT DISTINCT expiry_dt FROM DEV_IBSWIN..standby standby
               WHERE refno = liabhist.postfol_refno)
          WHEN SUBSTRING(liabhist.postfol_refno, 1, 3) IN('BAF', 'BAB', 'DPB') THEN
               (SELECT DISTINCT maturity_dt FROM DEV_IBSWIN..finance finance
               WHERE refno = liabhist.postfol_refno)
          END),
     liabhist.logtime,
     customer.scf_obligor,
     customer.scf_entity_type,
     customer.scf_ssn,
     customer.scf_sic
FROM      DEV_IBSWIN..liabhist liabhist INNER JOIN DEV_IBSWIN..customer customer ON liabhist.mnem = customer.mnem
WHERE      liabhist.logtime >= '04/01/02'
AND     liabhist.logtime <= '04/30/02'
ORDER BY liabhist.logtime

Here are the errors I am getting:

Msg 195, Level 15, State 10
'REPLACE' is not a recognized built-in function name.
Msg 156, Level 15, State 1
Incorrect syntax near the keyword 'WHEN'.
Msg 156, Level 15, State 1
Incorrect syntax near the keyword 'WHEN'.
Msg 156, Level 15, State 1
Incorrect syntax near the keyword 'END'.
Msg 156, Level 15, State 1
Incorrect syntax near the keyword 'WHEN'.
Msg 156, Level 15, State 1
Incorrect syntax near the keyword 'WHEN'.
Msg 156, Level 15, State 1
Incorrect syntax near the keyword 'END'.