Initial WEB SYNC REPLICATION session is not completed

I am receiving the following messages from WEB SYNC session progress....

<<<<<<<<< QUOTE # 2015-09-21 12:04:40.385 Connecting to Subscriber 'MSTSHIP\SQLSHIP'

2015-09-21 12:04:40.572 Connecting to Subscriber 'MSTSHIP\SQLSHIP'

2015-09-21 12:04:40.588 The upload message to be sent to Publisher 'MSTOFFICE\SQLCOMPANY' is being generated

2015-09-21 12:04:40.588 The merge process is using Exchange ID '806FFC96-D255- 463D-88AA-FB8586F2004D' for this web synchronization session.

2015-09-21 12:04:41.024 No data needed to be merged.

2015-09-21 12:04:41.040 Request message generated, now making it ready for upload.

2015-09-21 12:04:41.056 Upload request size is 1472 bytes.

2015-09-21 12:04:41.539 Uploaded a total of 1 chunks.

2015-09-21 12:04:41.555 The request message was sent to 'http://ift.tt/1KGez44'

2015-09-21 12:04:41.586 Downloaded a total of 3 chunks.

2015-09-21 12:04:41.602 The response message was received from 'http://ift.tt/1KGez44' and is being processed.

2015-09-21 12:04:41.617 The subscription to publication 'WEB_PUBLICATION' has expired or does not exist.

2015-09-21 12:04:41.617 Category:NULL

Source: Merge Process(Web Sync Server) Number: -2147200985 Message: The subscription to publication 'WEB_PUBLICATION' has expired or does not exist.

<<<<<<<<<<<<< UNQUOTE

Any idea why the manager did not uploading downloaded chunks?????? Look that communication is ok.