Crystal Reports 11 - Chart

I added a chart to my report which looks great. My data shows time (in minutes) on certain days (e.g. 2/1/2009). I have my chart showing what I want which is the time on the vertical axis and date on the horizontal axis. The problem I am running into is the amount of days between each tick on the horizontal axis. It simply puts the date that is associated with the time on the horizontal axis. What I am trying to have it do is have 7 days between all dates on the horizontal axis, no matter how much time, if any was on that day. Any ideas?