This is a common problem among older men. It is natural for it to happen. But there is also something you can do about it. The first is to improve your physical fitness (ie, cardiovascular fitness). I'll be putting up a full post on this quite soon, so keep checking back. 

Iam healthy,I run 2miles everyother day,and workout the other days,so I dont think my fitness level is the problem.This makes me wonder about the mental part? The excitment,the feeling just isnt there.Sometimes it feels like its going to happen ,then the level seems to drop away and it dosent matter what happens I wont reach orgasm.

You say this is a common problem,please enlighten me as to the best solution here,I'm pretty concerned about this.........Thanx Dan

Ok i'm still working on a post on this topic, don't want to post up just yet until i've researched it properly.
But for a very quick summary, getting to orgasm takes a certain amount of work for your heart, as you'll notice your heart beats fast after you orgasm. But as you age, your average/working/maximum heart rate drops something like 10 bpms every 10 years. So as you get older, orgasm becomes just that little bit harder to attain.
BUT, if you work to improve your heart strength ie, cardiovascular fitness, with regular strenuous exercise, this makes orgasm easier to get to...

Another thing to try is weightlifting, using heavy weights and low reps. This builds muscle and stimulates the production of testosterone, which definitely helps with helps with getting hard erections. Although at this point I'm not certain if a higher testosterone level helps with getting to orgasm.

Thanks for the summary,I'll keep an eye out your findings after youve researched more.