HI Rajarama,
I tried the option that you suggested in the table CRMC_REC_OBJ_AC; but that did not work either see the screenshot below with the configuration-
Also, I looked at the link that you have sent and then looked for the External Object Name entry for Campaign Element in the table BSP_DLC_OBJ_TYPE -
And then I maintained this External Object Name in the table CRMC_REC_OBJ_AC; but even that did not work
Let me know if there is still anything else that would make it work??
Thanks,
Ravi