Cannot accept change from stream into workspace

Cannot accept changes into workspace from stream.
Steps:
1.created project area, created a stream, two workspaces(for two users), set up user roles.
2. set the targetflow between stream and workspaces,
3. loaded empty workspaces into sandboxes in my local machine by logging in different users,
4. checked in and delivered new files(45,000files) from one of the workspace into stream
5. accepted new changes from stream into another workspace
cmd:
lscm accept -c 5441 -r https:/xxx:9443/ccm -s RTCStream -t RTCWorkspace

problem after waiting for 12 hours:
Workspace unchanged.

I can see the files are checked into stream from the browser admin console

version: RTC5.0 server and client

created new workspace by another userid:
lscm create workspace -r https://xx:9443/ccm User3Workspace -s RTCStream
lscm set flowtarget RTCStream User3Workspace -r https://xxx:9443/ccm
lscm remove component User3Workspace RTCComponent -r https://xxx:9443/ccm(remove the component in new workspace since it contains all the files in stream)
lscm add component User3Workspace RTCComponent -r https://xxx:9443/ccm(added component in new workspace)
lscm load -d "c:\dataRTC\user3" -r https://xxx:9443/ccm  User3Workspace
lscm accept -c 5441 -r https://xxx:9443/ccm -s RTCStream -t User3Workspace >..\log.txt

Problem:
the changeset in stream was loaded in to the workspace in repository, but was not copied into sanbox "c:\dataRTC\user3"
there is only on changeset 5541 in stream(another is the initial changeset)