IPN Validation Failure

[civiumpress]

I am using both the WP eStore and Affiliate Platform, and trying to test with PayPal Sandbox.

The payments seem to go through just fine, but neither records any stats, and my log shows and IPN Validation Failure:

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[10/26/2011 8:51 PM] – SUCCESS :Paypal Class Initiated by 173.0.82.126

[10/26/2011 8:51 PM] – SUCCESS :Post string : mc_gross=12.92&protection_eligibility=Ineligible&address_status=confirmed&item_number1=5&payer_id=EJP4MNPZXZ2H6&tax=0.00&address_street=1+Main+St&payment_date=13%3A51%3A01+Oct+26%2C+2011+PDT&payment_status=Pending&charset=windows-1252&address_zip=95131&mc_shipping=0.00&mc_handling=3.59&first_name=Test&mc_fee=0.67&address_country_code=US&address_name=Test+User&notify_version=3.4&custom=ap_id%3Dtest%26ip%3D174.70.174.4&payer_status=verified&business=web_1319254449_biz%40civiumpress.com&address_country=United+States&num_cart_items=1&mc_handling1=0.00&address_city=San+Jose&verify_sign=AFcWxV21C7fd0v3bYYYRCpSSRl31AzY6LGR5TUZ37TL-R8SK1XZtnMCP&payer_email=web_1319254286_per%40civiumpress.com&mc_shipping1=0.00&txn_id=4AV66001994061935&payment_type=instant&last_name=User&address_state=CA&item_name1=Phantastes+by++George+MacDonald&receiver_email=web_1319254449_biz%40civiumpress.com&payment_fee=0.67&quantity1=1&receiver_id=4385ARF98G37L&pending_reason=paymentreview&txn_type=cart&mc_gross_1=9.33&mc_currency=USD&residence_country=US&test_ipn=1&transaction_subject=ap_id%3Dtest%26ip%3D174.70.174.4&payment_gross=12.92&ipn_track_id=I7Kffd.vF2e6cOII1rca.Q&

[10/26/2011 8:51 PM] – SUCCESS :Connection to http://www.sandbox.paypal.com successfuly completed.

[10/26/2011 8:51 PM] – FAILURE :IPN validation failed.

[10/26/2011 8:51 PM] – SUCCESS :Paypal class finished.

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I have ensured that IPN is activated in PayPal, but am not quite sure where else I should looking for mis-settings.

[wzp]

IPN sent to the plugin (example, WP eStore) are failing

PayPal Sandbox Changes – https://support.tipsandtricks-hq.com/forums/topic/paypal-sandbox-changes

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