Servlet plus WebServices

Hi all.

I have web-app.One of task of this app is create document in different format(pdf,xml,html and other), from xml-datasource.

The work schema are:
client transmit on web-servlet ID of xml document, on servlet i'm connect to DB and get xml document as bytearray, after this servlet connect to web-services on the other server and transmit parameters (conver type and xml-bytearray). web-service respond bytearray of converted document. after this servlet transmit bytearrayof converted document to client.

when i transmit to web-service big xml document (more 1MB) my app not respond for request.

what could be the problem?

Any number of things could be going wrong. Best to check the log files for the container of your servlet and the server which is doing the conversion.