Line Graphing

[demkalt]

Hello,

Can someone explain to me how to get the linegraph to graph
5 different value's between two dates where the value's
depend on the ID. The value's must not be summerized or anything, just displayed.
so far the graph can't give more then 1 value before charting the rest on 0.
on the "report on" I used this formula

Datevar Datum;

if ({Data.DataID})=2575 then
Datum := date({@DATE_TIME})
else
if ({Data.DataID})=2620 then
Datum := date({@DATE_TIME})
else
if ({Data.DataID})=2587 then
Datum := date({@DATE_TIME})

On "show value's i used these per value:

if {Data.DataID}=2575 then {Data.Value}

if {Data.DataID}=2620 then {Data.Value}
etc..
So far no luck only one good line, rest 0. Can someone offer help on this one ??

Regards,
Robert