Iranian Foreign Ministry spokesman Hassan Qashqavi said Monday that Western states have no choice but to win Iranians' trust on the country's nuclear issue, the official IRNA news agency reported.

The West had to give a responsive and "positive" answer to the letter sent by Iran's top nuclear negotiator Saeed Jalili to the EU foreign policy chief Javier Solana, Qashqavi told reporters at his weekly press conference.

"We hope to continue (nuclear) talks," Qashqavi was quoted as saying.

Iran has so far had a "massive, constructive and serious cooperation" with the International Atomic Energy Agency (IAEA), he said, adding that Tehran has given a 200-page response to show its goodwill to those "undocumented claims."

Jalili sent a letter to Solana recently, disclosing Iran's stance on the West's behavior towards Iran's nuclear activities.

The spokesman said the constructive cooperation between Iran, the IAEA and six major powers of Britain, China, France, Germany, Russia and the United States has been emphasized in the letter.

Iranian Majlis (Parliament) Speaker Ali Larijani said Saturday that Iran does not think that nuclear negotiations with the West have reached a standstill and an appropriate solution is still possible if the West would alter some of its behaviors.

On June 14, Solana handed an offer of incentives to the Iranian authorities on behalf of the six nations during his visit to Tehran in a bid to persuade Iran to halt uranium enrichment.

The UN Security Council has unanimously adopted Resolution 1835 to reaffirm its previous resolutions on Iran and demand full compliance from the Islamic Republic.

It called on Iran, which till now has been under three UN sanctions over its disputed nuclear program, "to comply fully and without delay with its obligations" and to meet the requirements of the IAEA Board of Governors.

According to an IAEA recent report, the UN nuclear watchdog had been unable to make much progress in investigating Iran's suspect nuclear program due to Tehran's block.

The United States and its allies have accused Iran of developing nuclear weapons, but Iran insists that its nuclear program is only for peaceful purposes.

(Xinhua News Agency October 13, 2008)