Error whole registering as External Candidate

HI,

We are on ECC eph3 , and E Recruitment and ECC are in two different server. this is the background.

While registering as the External Canidate we are encountring with a error message "You are not authorized to assign roles "

i have maintained service and dialog user in both ECC and EREC system, have maintained settings related to SICF...but in vain

pls let me know if u have any inputs on same.

Kind regards

Sathya