rich nation. The ex-rebels say efforts to implement major aspects of the peace deal, such as creating a united army, have failed. They accuse Kabila of surrounding himself with unofficial security groups and advisers, and excluding RCD-Goma from key decisions. Kabila's camp says RCD-Goma wants to disrupt the transition to avoid going towards presidential elections slated for 2005. Ruberwa asked the United Nations and South Africa to mediate in the crisis. South African President Thabo Mbeki was due in Kinshasa on August 30, the Congolese presidency said. "It's a disappointment," said a diplomat in Kinshasa. "All we see is each side accusing the other of holding up the process, rather than stepping forward with solutions."