Discontinuous Time Series Charts

I just joined ozgrid and this is my very first post. I have read the rules but spare me if I make some errors.

My question is related to plotting time series charts using VBA. I have data in the following format.

04/21/08 9:04:47 4.5055
04/21/08 9:04:48 4.5055
04/21/08 9:04:49 4.5055
04/21/08 9:04:49 4.5055
04/21/08 9:04:50 4.5055

04/21/08 10:05:00 3.5055
04/21/08 10:05:32 3.5055
04/21/08 10:05:40 3.5055
04/21/08 10:05:48 3.5055
04/21/08 10:05:51 3.5055

04/21/08 11:07:59 5.5055
04/21/08 11:09:00 5.5055
04/21/08 11:10:01 5.5055
04/21/08 11:11:02 5.5055
04/21/08 11:13:08 5.5055
04/21/08 11:14:11 5.5055
04/21/08 11:15:16 5.5055

The column on the left is NOW() output and the one on the right is data corresponding to the given date and time. You may interpret the above data as snapshots taken at regular time intervals.

Now what I want to do is make a chart with the above data. Where ever there is a break in the snapshots, represented by a blank line, I want the graph to jump to the next data point much as the way stock prices move from the closing price to the opening price on the next day. I am not able to figure how to do that. Since I want the x-axis to represent time, using scatter charts does not work since the intervals are not proportional to the time then.