Amazon "Upload Order Related Files" ERROR

things have been working fine with Shiprush for stamps.com ORder Manager, but today when processing and printing my Amazon orders, all the order related files transmitted to Amazon all had errors, and thus, none of them confirmed being "shipped" with Amazon and I had to go in and confirm each order by hand ---

How can I find out what the issue is? How to go about fixing?

my eBay transactions seem to be still processing fine, its just the Amazon ones with the error.

I downloaded the "view processing report" but I'm not sure what to look for. I see it keeps saying "result message code 25"

here is a portion of the xml report:

-------------
<MessageType>ProcessingReport</MessageType>
<Message>
<MessageID>1</MessageID>
<ProcessingReport>
<DocumentTransactionID>8941259266</DocumentTransactionID>
<StatusCode>Complete</StatusCode>
<ProcessingSummary>
<MessagesProcessed>21</MessagesProcessed>
<MessagesSuccessful>0</MessagesSuccessful>
<MessagesWithError>21</MessagesWithError>
<MessagesWithWarning>0</MessagesWithWarning>
</ProcessingSummary>
<Result>
<MessageID>110345758</MessageID>
<ResultCode>Error</ResultCode>
<ResultMessageCode>25</ResultMessageCode>
<ResultDescription>We are unable to process the XML feed because one or more items are invalid. Please re-submit the feed.</ResultDescription>
</Result>
<Result>
<MessageID>151247408</MessageID>
<ResultCode>Error</ResultCode>
<ResultMessageCode>25</ResultMessageCode>
<ResultDescription>We are unable to process the XML feed because one or more items are invalid. Please re-submit the feed.</ResultDescription>
</Result>
<Result>
<MessageID>173050862</MessageID>
<ResultCode>Error</ResultCode>
<ResultMessageCode>25</ResultMessageCode>
<ResultDescription>We are unable to process the XML feed because one or more items are invalid. Please re-submit the feed.</ResultDescription>
</Result>
--------------


any help would be appreciated! thank you!!