[?]: wincc 7 online trend control and print job

[ELYAS_GH]

in wincc7 of wincc online trend control for two tags are used.
In the general tab, view current print job online trend control-picture mode selected.
In the report designer in @ online trend control-picture settings for print jobs like this every day for eight hours a day printing operation is performed.
The print job is run vertex But no print trend in the page
on the screen printed only letter head, project name, time, date and page number
What is the cause?
Thanks