LUXEMBOURG (AFP) - European Union finance ministers failed to agree a deal on Tuesday on who will pay what towards helping developing countries fight global warming, the blocs presidency said. It is a disappointing outcome that we have not been able to reach agreement on climate financing today, said Swedish Finance Minister Anders Borg after member states met in Luxembourg. There are several very difficult issues that will have to be dealt with, he added, pointing to next weeks summit of EU leaders in Brussels. Obviously the political pressure on this issue ... will increase, he said, expressing the hope that opposition from nine, mainly eastern European countries and Germany, will fade in the run-up to United Nations negotiations in Copenhagen in December. Britains Chancellor Alistair Darling delayed his flight to try and salvage a compromise agreement, which would have seen the nine legitimise European Commission figures that say the EU will need to cough up some 100 billion euros (149 billion dollars) each year from 2012 to meet developing world needs. We had a good opportunity today, Darling added. Unfortunately, a number of countries wanted two things that the majority found unacceptable. He said Poland and its allies wanted so-called 'fast-start financing, for the period leading up to the expiry of the existing global Kyoto protocol, to be contributed on a voluntary basis.