Help! Simple Graph of Crystal Report

Hi Everybody,
I have just started to work with Crystal Report and I am facing I problem in drawing a line graph.I have to draw a simple graph from a table where one column is time(datatype is datetime in sql server) and another column is Flow(datatype is float).Flow is recorded in every minute.I have to plot the graph where time is at X axis and flow at Y axis(no summerized value).
But in Chart expert whenever I select time in X axis(that is on change of value), I find Find flow is coming as summerized value like sum,average etc(but I want simple plotting without summerization).
If I take 'each record' option from chart expert for time column,I find X axis is showing mere numbers like 0,1,2..... instead of time which I require.
If anybody can help me I will be greatful to this group.
Thanking you.
Siddhartha.