It's really hard for anyone to give you a suggestion without knowing where your hops are coming from. I'm assuming you're promoting some clickbank products on your own site, is the traffic to that particular page of your site still as high as it was one month ago?

You have to find out if the problem is on your or clickbank's side. If it's on yours then it should be easy to fix or at least easier than if clickbank's tracking is the problem.

Well I have sent an email to clickbank asking them about this. I have not heard anything back as of yet. I have noticed that their analytics data is delayed and it has been for a number of weeks. I am not sure if that has anything to do with it or not.

The traffic to my sites is still going strong. My best site gets at least 500 visits a week.
Some of products I promote are the ones with high gravity on clickbank such as truth about abs, panic away, jamorama, reversephone lookups and governement records.

Its very frustrating and disheartning to see all my efforts not produce any results.

You can get more hops through article writing. I write articles for people if your interested, please pm me and I'll show you a sample. My articles are about 350 words with normally two links per article.