the Show Value is in the Chart Expert > Data tab.
I would recommend that you recreate the chart, starting with a Line type chart as suggested above. I can create this type of chart with no issue on crystal v 14.1.1.1036.
before you try the new chart though:
1) have a look at the attachment. extract the contents and change the .txt extension to .rpt.
2) right click on the chart and go to Chart Expert and click through all of the tabs.
3) then right click on each series (first the Line and then the Bar) and choose Series Options and have a look at the first tab.
4) right click on one of the horizontal axis dates and choose Chart Options and have a look at each tab.
5) right click on one of the horizontal axis dates and choose Data (Y) Axis Options and have a look at all of the tabs.