Updating .pdf file issue in sql

I have to update a .pdf filename in the database in a file -> Sql scenario. The number of files are ennumerous and each file has a corresponding entry in SQL table.

for eg: the database entry is : abc.pdf

The error i’m getting is :

A message received by adapter “FILE” on receive location “Receive Location2” with URI “C:\Projects\Udatepdfstatus\in\*.pdf” is suspended.

Error details: The published message could not be routed because no subscribers were found. This error occurs if the subscribing orchestration or send port has not been enlisted, or if some of the message properties necessary for subscription evaluation have not been promoted. Please use the Biztalk Administration console to troubleshoot this failure.

The same thing, if it’s an .xml file, works fine. I have my pipelines as PassThrough in both the send and receive ends.

Could anyone tell me where I’m going wrong or is it that the .pdf thing can’t be handled in Biztalk?