We have 2 store in one magento.
.com.au domain for AU, .co.nz for NZ.
We have set same paypal api key to both store.
However, paypal checkout works in AU store, but it does not work for NZ store.
here is the response from NZ paypal checkout
[response] => Array
[TIMESTAMP] => 2016-05-04T04:38:53Z
[CORRELATIONID] => ea7476e0e2e2f
[ACK] => Failure
[VERSION] => 72.0
[BUILD] => 21799703
[L_ERRORCODE0] => 10002
[L_SHORTMESSAGE0] => Security error
any idea how to fix it?