North Korea and South Korea's relation

http://www.koreaherald.com/national/Detail.jsp?newsMLId=20110225000765

South and North Korea do not want to achieve unification by keeping up efforts to continue inter-Korean dialogue. North Korea has definitely attacked South's property, but they denied their attack from 2010 and earlier this year. South Korean prim minister, Kim Hwang-sik states  “The (South Korean) government does not regard North Korea as a target of absorption." He also announced that they will put effort in persuading North Korea to change. South Korea has helped North Korea supplying foods and doing favors for their nuclear weapon until North has killed many sailors and two civilians. Because of failing the defensive military talks between two korea, the government has said that talks should only be held when an actual progress in North can be expected. North Korea attacked South Korea twice, which seriously injured the relationship between North and South Korea: however, N. Korea denies this and did not apologize to South Korea.
I believe it should not be South Korea that needs more effort to alter the relationship better, but North Korea does.North Korea should have thought about how much their fellow country has helped them and must try maintaing a good relationship eachother.