XML To WMS

I’m having a problem uploading this XML document in WMS_Administrator_Integration_B2B_Document Types Administration_Document Type.

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I’m getting this Error:
You uploaded a sample document that is not valid. Provide a sample document with a valid root node

Please Any suggestions.
Thanks

I think that this is a B2B question. I’d recommend posting this question to one of the other forums more focused on Integration Server or B2B.

Regards,
–mark