By Opheera McDoom

KHARTOUM, Aug 7 (Reuters) - Sudan's government is not enthusiastic about some elements of a joint Darfur rebel platform agreed during U.N. and African Union mediated talks in Tanzania, U.N. Darfur envoy Jan Eliasson said on Tuesday.

Eliasson and his AU counterpart Salim Ahmed Salim brought many Darfur commanders and groups together for unity talks in Arusha. They emerged from the meeting with a common platform, including land issues, power and wealth-sharing, ahead of proposed peace talks with the government.

But Khartoum, which says a Darfur peace deal it signed with one of three rebel negotiating factions in May 2006 should not be reopened, was not happy with all the issues raised in the rebel's final joint declaration.

"Not all of the points of course are met with great enthusiasm, but it is a basis," Eliasson told reporters after the meeting.

"The government does not want to have a renegotiation of the DPA (Darfur Peace Agreement) so this is a matter we will discuss both with the government and with the non-signatories -- how will we finalise the final agenda."

He said the joint U.N.-AU team would use shuttle diplomacy over the coming weeks to try to bring the government and rebel positions together and reach a final agenda for talks, due to begin in about two months.

Foreign Ministry Spokesman Ali al-Sadig, after Eliasson met with a senior ministry official in Khartoum, said: "Sudan is ready to work on some of the parts of the statement including the ceasefire declaration".

International experts estimate 200,000 people have died and 2.5 million driven from their homes during more than four years of rape, murder, disease and looting in Darfur, violence Washington calls genocide.

European governments are reluctant to use the term, which Khartoum rejects. Sudan puts the death toll at 9,000.

Since last year's peace deal Darfur's rebels have split into more than a dozen factions, presenting a major barrier to talks.

Analysts have said the Arusha meeting's chance of success were hampered by the absence of some important rebel figures, but nonetheless succeeded in boosting unity.

Eliasson said a seat was available for Darfur rebel Sudan Liberation Army (SLA) leader and founder Abdel Wahed Mohamed el-Nur, who refuses any talks until an oil-for-food programme and no-fly zone is in place in Sudan's remote west.

Khartoum at the weekend expressed its anger at France, hosting Nur, for not pressuring him to attend the Arusha talks.

"I hope that he will positively consider the role that he can play in these talks," said Eliasson.

Nur has few troops on the ground but commands huge popular support among Darfur's largest tribe, the Fur.

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