authorize.net refund

[Si Chen]

Hi.  I'm looking at the authorize.net stuff, and I found that  
authorize and capture both work (Good job, Fred!)  Refunds, though,  
give this error:
2006-09-12 16:35:08,207 (http-0.0.0.0-8443-Processor4)  
[ AIMPaymentServices.java:281:INFO ] --> TRANSACTION DECLINED <--
2006-09-12 16:35:08,210 (http-0.0.0.0-8443-Processor4)  
[ AIMPaymentServices.java:282:INFO ] responseCode:   3
2006-09-12 16:35:08,212 (http-0.0.0.0-8443-Processor4)  
[ AIMPaymentServices.java:283:INFO ] responseReason: 54
2006-09-12 16:35:08,214 (http-0.0.0.0-8443-Processor4)  
[ AIMPaymentServices.java:284:INFO ] reasonText:     The referenced  
transaction does not meet the criteria for issuing a credit.
2006-09-12 16:35:08,262 (http-0.0.0.0-8443-Processor4)  
[ AIMPaymentServices.java:591:INFO ] processRefundTransResult:  
[responseMessage=success, refundResult=false, refundFlag=54,  
refundMessage=The referenced transaction does not meet the criteria  
for issuing a credit., refundAmount=0.0]
2006-09-12 16:35:08,265 (http-0.0.0.0-8443-Processor4)  
[ AIMPaymentServices.java:201:INFO ] <-- Authorize.net ccCapture  
Transaction End -->

I remember Fred saying that this was new -- has it been fully tested?
Si