Jason - I finally have the testing environment set up between eCart 6 and PayPal Payments Advanced. Thanks for your help on that. The only problem I'm still having is that I cannot get the checkout_success page to come up after a transaction goes through with the credit card information. I keep getting the checkout_failure page. I added the code to dump the session variable to the checkout_failure page and I'm getting a RESULT=0 and RESPMSG=Approved. These seem to be successful results so why would I be getting the checkout_failure page.
I do have the proper API credentials and the sandbox radio button is checked ineCart and the mode over on the PayPal side is set to 'Test'.
I've copied the dump below. Thanks for all your help so far-
Phil
L_DESC0=These+Earrings+are+made+from+actual+Brightivison+Redline+Wheels%21+Have+great+fun+with+these+awesome+Hot+Wheels+Redline+Earrings%21&L_AMT0=6.95&L_QTY0=1&TAXAMT=0&SHIPPINGAMT=0&AMT=6.95&ITEMAMT=6.95" ["PP_PayAdv"]=> string(110) "RESULT=0&SECURETOKEN=Utxz4bR8ddEapcGsUSwgniQL2&SECURETOKENID=fdc27087c5b1bead4098e8c92b1c0e5c&RESPMSG=Approved" ["PP_PayAdv_retVals"]=> array(4) { ["RESULT"]=> string(1) "0" ["SECURETOKEN"]=> string(25) "Utxz4bR8ddEapcGsUSwgniQL2" ["SECURETOKENID"]=> string(32) "fdc27087c5b1bead4098e8c92b1c0e5c" ["RESPMSG"]=> string(8) "Approved" } ["PP_PayAdv_errorMessage"]=> string(0) "" ["wa_Utxz4bR8ddEapcGsUSwgniQL2_Items"]=> string(483) "37|WAECART|Hot Wheels Redline Earrings|WAECART|