data label disappears when I move it
 

I am working in Excel 2007. I have a stacked bar chart I created with one
data point that skews everything, so I changed the scale and just wanted to
label that point (bar) to show what the actual value is. The label shows up
fine, but when I go to move the label to a different position on the chart
with my mouse, it disappears. The funny thing is, I have another chart with
the same situation, but that data label moves just fine. Any suggestions for
this annoying problem?