Я получаю следующее из сценария PayPal IPN. Из следующего видно, что вызывает сбой транзакции IPN? Если нет, как я могу исследовать проблему дальше?

[01/25/2010 7:49 PM] - FAIL: IPN Validation Failed.
IPN $_POST variables from PayPal:
mc_gross=25.00
protection_eligibility=Ineligible
address_status=unconfirmed
payer_id=AEVB83JZKDRCL
tax=0.00
address_street=1 Main Terrace
payment_date=10:49:52 Jan 25, 2010 PST
payment_status=Pending
charset=windows-1252
address_zip=W12 4LQ
first_name=Test
address_country_code=GB
address_name=Test User
notify_version=2.9
custom=
payer_status=unverified
address_country=United Kingdom
address_city=Wolverhampton
quantity=1
verify_sign=A0I1KzEZadt6mIDXxQkkIQCQKPTMAGvCuZ8RKXsOCujIi.RoMxAnbZXi
[email protected]
txn_id=38A45069EV5838100
payment_type=instant
last_name=User
address_state=West Midlands
[email protected]
pending_reason=unilateral
txn_type=web_accept
item_name=Ultimate Challenge UK Ressurection  Standard Seating (25.00 GBP)
mc_currency=GBP
item_number=
residence_country=GB
test_ipn=1
handling_amount=0.00
transaction_subject=Ultimate Challenge UK Ressurection  Standard Seating (25.00 GBP)
payment_gross=
shipping=0.00


IPN response from PayPal server:
 HTTP/1.1 200 OK
Date: Mon, 25 Jan 2010 18:49:56 GMT
Server: Apache
Set-Cookie: cwrClyrK4LoCV1fydGbAxiNL6iG=_hMqg4cipUMV6RnPhXQ-05S5HEZk2hx2Yc87bjkBg5dZZLYqHTsxqiYwvU9Hjas5YeKTg9jnkbQYomER3_bjuAIW9f15003nc2FYPzIYqFuCc-Jfz1B8byXHhtrJ6OHyiPlmo0%7cGRbawzJR-iAiebJ1pZJZ3DzypAO4untXvofHa07UaqPHkeOZNQTSoCfMobgODGnxgP6jHW%7cf29zaCIP63s4TuzaT12cEiU-aih_kOHju4cqZ4KPV18bl-LTNlFzFLLGmr_DOhyXznq--m%7c1264445397; domain=.paypal.com; path=/
Set-Cookie: cookie_check=yes; expires=Thu, 23-Jan-2020 18:49:57 GMT; domain=.paypal.com; path=/
Set-Cookie: navcmd=_notify-validate; domain=.paypal.com; path=/
Set-Cookie: navlns=0; expires=Sun, 20-Jan-2030 18:49:57 GMT; domain=.paypal.com; path=/
Vary: Accept-Encoding
Keep-Alive: timeout=5, max=92
Connection: Keep-Alive
Transfer-Encoding: chunked
Content-Type: text/html; charset=UTF-8

7
INVALID
0