Time for some troubleshooting:
1) Ensure that the font for the report is not set to white. Click on the control then click on format, then font then set the colour. Does this work?
1) Create a completely new report. Does this one print okay?
2) Copy one of the fields from the bad report to the good report. Does this field display on the good report?
3) Copy or create a new field on the bad report. Does this field print properly?

My guess is that the report is either corrupt or that the font has been set to white by mistake.

>I have a report that i see all the report lines at the preview mode.
>But,when i print the report on white sheet,i do not see some of the lines (i checked on several types of printers).The Reason to my Opinoin is that while printing ,the forecolor changes to white and this is the reason i do not see this lines.Of course,if i print on not white sheet i see whites streeps on the sheet.All fields have black forecolor.
>Thank you for your Help. Grisha