PayPal Pro checkout error

Got this error message on debug. I cant seem to process a payment and move on to the next step. Also I noticed that if i don't put anything in a field there is no red box indicators to warn me it just refreshes the page, can this be changed as well? you can try it yourself here...

[url=http://]http://www.northamericanaerials.com/index.php?option=com_hikashop&ctrl=product&task=show&product_id=1&name=mackinac-bridge&Itemid=582&lang=en[/url]



Array ( [USER] => This email address is being protected from spambots. You need JavaScript enabled to view it. [PWD] => xxxxxx [SIGNATURE] => Dxxl x xx [VERSION] => 51.0 [METHOD] => DoDirectPayment [PAYMENTACTION] => Authorization [AMT] => 320 [ACCT] => 542432510xxxxxxx [EXPDATE] => 102015 [FIRSTNAME] => Daniel [LASTNAME] => zzzzzz [CURRENCYCODE] => USD => info@northamericanaerials.com [STREET] => 1325 island hwy [STREET2] => [CITY] => lansing [STATE] => Michigan [COUNTRYCODE] => US [ZIP] => 48911 [BN] => HikariSoftware_Cart_DP [SHIPTONAME] => Daniel Kairys [SHIPTOSTREET] => 1325 island hwy [SHIPTOSTREET2] => [SHIPTOCITY] => lansing [SHIPTOSTATE] => Michigan [SHIPTOCOUNTRY] => US [SHIPTOZIP] => 48911 [SHIPTOPHONENUM] => [L_NAME1] => Mackinac Bridge: 96x35 [L_NUMBER1] => Mackinac_Bridge_3 [L_AMT1] => 320 [L_QTY1] => 1 [L_TAXAMT1] => 0 [ITEMAMT] => 320 ) api-3t.paypal.com/nvp Array ( [TIMESTAMP] => 2013%2d02%2d20T04%3a42%3a36Z [CORRELATIONID] => 7fe72be6574ed [ACK] => Failure [VERSION] => 51%2e0 [BUILD] => 5060305 [L_ERRORCODE0] => 10002 [L_SHORTMESSAGE0] => Security%20error [L_LONGMESSAGE0] => Security%20header%20is%20not%20valid [L_SEVERITYCODE0] => Error ) :huh: Thanks, Dan[EMAIL] => This email address is being protected from spambots. You need JavaScript enabled to view it. [STREET] => 1325 island hwy [STREET2] => [CITY] => lansing [STATE] => Michigan [COUNTRYCODE] => US [ZIP] => 48911 [BN] => HikariSoftware_Cart_DP [SHIPTONAME] => Daniel Kairys [SHIPTOSTREET] => 1325 island hwy [SHIPTOSTREET2] => [SHIPTOCITY] => lansing [SHIPTOSTATE] => Michigan [SHIPTOCOUNTRY] => US [SHIPTOZIP] => 48911 [SHIPTOPHONENUM] => [L_NAME1] => Mackinac Bridge: 96x35 [L_NUMBER1] => Mackinac_Bridge_3 [L_AMT1] => 320 [L_QTY1] => 1 [L_TAXAMT1] => 0 [ITEMAMT] => 320 ) api-3t.paypal.com/nvp Array ( [TIMESTAMP] => 2013%2d02%2d20T04%3a42%3a36Z [CORRELATIONID] => 7fe72be6574ed [ACK] => Failure [VERSION] => 51%2e0 [BUILD] => 5060305 [L_ERRORCODE0] => 10002 [L_SHORTMESSAGE0] => Security%20error [L_LONGMESSAGE0] => Security%20header%20is%20not%20valid [L_SEVERITYCODE0] => Error )




Thanks,

Dan