Can you mount it manually on your Mac with the appropriate accounts? If so, server-side permissions are okay.

It's likely in the way you've defined the server in the JSS. Are you using local or domain accounts?

Yes I can mount it manually using the local accounts I've created on the server.

Try Casper Admin in different machine. Even I faced this issue in SMB Share, but Casper Admin on other machine worked.

Thanks,
Karthikeyan

Make sure you don't have any Kerberos tickets on your machine either.

Still no luck on a different machine.
when you say kerberos tickets, is that in general or something specific to JSS etc?
Thanks for your help guys!

Here's the log file I've been getting.

-- Syncing smb://chlcasper.icr.ac.uk/Casper 23/07/2012 15:12 --
2012-07-23 15:12:20: Comparing files based on date
2012-07-23 15:12:20: Mounting smb://chlcasper.icr.ac.uk/Casper...
2012-07-23 15:12:34: ERROR: The Distribution Point could not be mounted. The syncing operation will stop
2012-07-23 15:12:34: Finished.
-- Unmounting smb://chlcasper.icr.ac.uk/Casper 23/07/2012 15:12 --

Can you post the server config from your JSS?

Display Name: Casper
DNS Name or IP Address: chlcasper.icr.ac.uk
Use this server as the Master: unticked
Failover Distribution Point: none
Enable Automatic Load Balancing
with Failover Distribution Point: unticked
Local Path: Casper/
SSH Username:
SSH Password:
Verify SSH Password:

Connection Type: SMB
Share Name: Casper
Workgroup or Domain (SMB only): icr.ac.uk
Port: 139
Read-Only Username: casperadmin
Read-Only Password: ***
Verify Read-Only Password: **
Read/Write Username: casperinstall
Read/Write Password: **
Verify Read/Write Password: ***

Workgroup or Domain (SMB only): icr.ac.uk
Port: 139

Well there's your problem. If it's a local account (as opposed to a domain account), it should be the name of the hostname. I'm guessing from other information here it should read "chlcasper." Remember to think Windows: the "domain" in this case is the local box that you're connecting to.

Your port should also be 445.

Thank you!