Try to go to the Details button for the Targets: iqn.2007-08:dssmm.target0 and logoff.
You may want to try with the connected one as well then refresh then logon for the dss target that stated "Connected".
Then go to Disk Manager > Action > Rescan Disk to see if this comes on line.
If you create another target from dss (CD-ROM) are you able to access the target (not being replicated), but for testing?
I just tested again with Demo-CD ver. 1.23 to DSS ver. 1.23 and this worked.
If you want I can provide an online web demonstration, email me at todd.maxwell@open-e.com and I will provide you a meeting number and schedule a time.
Also you can send me logs at this address to see if I can see anything that might be causing the issue.