The Canadian filmmaker and his musician husband tried to give a home to HIV-positive Ukrainian child Lev last year, but were rejected because Elton, at 63, was deemed too old and because of their gay marriage.
Speaking at the Butterfly Ball in London's Battersea Park, David told BANG Showbiz: "We did take age into consideration but we're both like teenagers anyway so it wasn't an issue for us."
Although Ukrainian law stopped them from becoming parents, the 47-year-old star has revealed the couple will try again.
He said: "We were both just so heartbroken by what happened last year, we just want to have a break and enjoy the summer."
David insists he and Elton will look at adopting from other countries but admits it is difficult for gay couples all over the world, even in the UK.
He said: "It's very difficult even in Britain. I think we're going to look at different places in the future, but not for now."
The star-studded Butterfly Ball, which was held in to raise money for the Caudwell Children charity, was also attended by Elizabeth Hurley, Peter Andre, Dame Shirley Bassey, Lulu, Sarah Ferguson - The Duchess Of York and Princess Beatrice.
The charity supports children with over 300 different conditions.