How can real progress be made on denuclearisation in the Korea peninsular?

Comments on Geoffrey K. See “An East Asian development fund for North Korea?” 25/07/2010, http://www.eastasiaforum.org/2010/07/25/an-east-asian-development-fund-for-north-korea/
The issue of North Korea has been in a vicious cycle: it is weak and becomes weaker and weaker and worries about its own security and survival; as a result, it has been developing nuclear weapons; its nuclearisation led to sanctions; any dialogues have not assured North Korea's fear of its security.

It is unlikely that a North Korea development fund would be able to allay its security fears in the current international circumstance.

There is currently no mechanism for North Korea to believe its security can be guaranteed.

Until it really feels that, it is unlikely to trust such a development fund. It may feel threatened by that.

Is there any way to assure North Korea’s security and leads to its giving up nuclear weapons and programs?

Maybe the parties involved in the six parties should make a collective guarantee of the security of both Koreas and the US then withdrawal its forces from the Korea peninsular as a gesture.

The international community including global and regional powers have tried various methods and so far they have shown unsuccessful. A collective security guarantee may be the only pragmatic way to successfully resolve the tension in the Korea peninsular.

A denuclearised and stable Korea peninsular is in every party’s interest.

Once North Korea feels no external threats to its security, it may see the benefits of trade and engagement with the outside world. That may lead to its integration with the international community.