mssql query, kan ikke finde fejlen (Incorrect syntax near ',')

Hej eksperter.
Jeg har en mssql query jeg prøve at sende igennem php (ikke fordi det er specielt relevant). Men jeg har åbenbart lavet en syntax fejl et eller andet sted.
Queryen skal lave en INSERT i en tabel der hedder invoice ud fra nogle andre tabeler og nogle få konstanter som jeg smider ind via php, men jeg får fejlen Incorrect syntax near ','.

Jeg kan simpelthen ikke finde fejlen.
sql'en ser således ud:

INSERT INTO invoice
(case_id, invoice_name, invoice_address, invoice_housenumber, invoice_postalcode, invoice_floor, invoice_city,
cust_name, cust_address, cust_housenumber, cust_floor, cust_postalcode, cust_city,
del_name, del_address, del_housenumber, del_floor, del_city, del_postalcode,
text, date, payment_date, type, ref, rek, customer_number, made_by, amount, vat, amount_vat, fi_number,
billed_electronic, electronic_date)

SELECT '$caseId',
CASE WHEN (cust.invoice_account = '' OR cust.invoice_account = NULL) THEN
    cust.invoice_name
ELSE
    (SELECT c.c.invoice_name FROM cust_customer AS c WHERE c.customer_number = cust.invoice_account)
END,

CASE WHEN (cust.invoice_account = '' OR cust.invoice_account = NULL) THEN
    cust.invoice_roadname
ELSE
    (SELECT c.c.invoice_roadname FROM cust_customer AS c WHERE c.customer_number = cust.invoice_account)
END,

CASE WHEN (cust.invoice_account = '' OR cust.invoice_account = NULL) THEN
    cust.invoice_housenumber
ELSE
    (SELECT c.invoice_housenumber FROM cust_customer AS c WHERE c.customer_number = cust.invoice_account)
END,

CASE WHEN (cust.invoice_account = '' OR cust.invoice_account = NULL) THEN
    cust.invoice_postalcode
ELSE
    (SELECT c.invoice_postalcode FROM cust_customer AS c WHERE c.customer_number = cust.invoice_account)
END,

CASE WHEN (cust.invoice_account = '' OR cust.invoice_account = NULL) THEN
    cust.invoice_sal
ELSE
    (SELECT c.invoice_sal FROM cust_customer AS c WHERE c.customer_number = cust.invoice_account)
END,

CASE WHEN (cust.invoice_account = '' OR cust.invoice_account = NULL) THEN
    cust.invoice_city
ELSE
    (SELECT c.invoice_city FROM cust_customer AS c WHERE c.customer_number = cust.invoice_account)
END,


cust.customer_name,

cust.customer_roadname,

cust.customer_housenumber,

cust.customer_sal,

cust.customer_postalcode,

cust.customer_city,

cust.customer_name,


del.name,

del.road_name,

del.road_number,

del.floor,

del.city,

del.postalcode,


'$text',

'$date',

'$paymentDate',

'1',


case.yourref,

case.rek,

cust.customer_number,

'$madeBy',

'$amount',

'$vat',

'$amountVat',

base.fi_number,

'0',

NULL

FROM cases AS case, baseData AS base LEFT OUTER JOIN cust_customer AS cust ON cust.id = case.customer_id LEFT OUTER JOIN cust_delivery_addresses AS del ON del.id = case.delivery_address WHERE case.id = '$id'

Håber meget i kan hjælpe mig.
Tak på forhånd