johnnie - 9:13 am on Feb 11, 2009 (gmt 0)
What is the source of your traffic? Which keywords are people coming in for? If PCC, check your negative keywords ('free', 'manual', etc). If organic, check the relevancy of the keywords people are looking for. Only if you're sure your traffic is not bogus, will it make sense to start tinkering with your landing page in the form of a multivariate test.