Hi Reza,

I had a similar problem resently when trying to print A3 size paper.
I found I had to:

0) Modify report
1) Check Save Printer Environment on the report (set it on)
2) Set the printer and page size in the report
3) save the report.
4) When printing do not change the expr and tag and tag2 fields.

If you want to print to another printer then remove the tag and tag2 fields.
But then set them back on after printing.

BR
Tim