Unfortunately, the CF that is running on these servers just doesn't perform. CF itself is probably the absolute worst server product I've ever seen, but a few people still use it. You're best bet is to try to convince your customer to move to PHP or ASP. We had a customer that we could not convince, and due to the constant issues they left us. Not sure where they went, but they did tell us that they do not have any CF issues on their new host. I don't necessarily believe this, just based on my own experience running CF servers in the past. But with not having the latest CF version on these servers, it could be adding to the issues..