Johannesburg - President Jacob Zuma and his Zambian counterpart Rupiah Banda on Thursday called for sanctions against Zimbabwe to be dropped.Sanctions were not aiding change in Zimbabwe, Zuma said in Pretoria after a memorandum of understanding on environmental management and natural resources between SA and Zambia was signed."We call on the globe to lift sanctions. It will be helpful. They (the sanctions) are inhibiting our progress."Banda said the Southern African Development Community troika would meet to discuss Zimbabwe in January.Zuma said that country's President Robert Mugabe wanted a resolution to Zimbabwe's problems, and that all parties in Zimbabwe were looking forward to the election.Banda is on a two-day state visit to South Africa.