Sharepoint event receiver itemAdding and itemadding not firing when document arrives from web service

Hello,

I have a system that uses content organizer and drop off library with routing rules. Depending of content type the document goes to one final document library.

If i upload document directly in drop off library, the route engine send the document to final document library and the event fire without problems.

When i send a document via sharepoint web service to the drop off library the route engine send the document to final library but the event receiver item adding and item added not fire.

Do you have any ideas to resolve this?

Thanks

Diogo Almeida