^ Good questions he has said that you should ask yourself.
Programs in the background can be one of the main reasons.
Try disabling your anti virus, or adding the entire CF Folder to your list of exceptions, that way you know your AV is not having any sort of conflict with xTrap.
Check if you have crossfire already running in Task Manager. It happened once to me when CF didn't close completely and was running in background, that the error I got.