What type of backup is this? What is listed in Backup Selection?
Has this worked previously?
The fact that you see 'connected' means that connection was successful and bpbkar should have bee started on the client, trying to snapshot volumes to be backed up.
Have you checked status of VSS writers on the client?
vssadmin list writers
Please post full bpcd log as well as bpbkar log.
Create bpfis log folder as well and post along with above logs.
Copy files to .txt files (e.g. bpbkar.txt) and upload as file attachments.