Jasper Server shows null instead of values for lot of rows

[sjmon3]

Hi!

i've created a report (very simple) that extracts more than 17K rows.

 If i launch it from Jasper Studio all is working good, but if i launch it from Jasper Report Server the reports extracts only few rows correctly and shows null on all other rows, but the number of empty rows (with structure) is correct. 

I've tried to make a new report from Studio but is always the same. In Studio works, in Server not works fine. The datasource is the same in both platform. The font is used in lot of other report (that works).

All other reports works well (even other new and just developed).

 

What i can do?

[mahadiosb]

Where you put that field? example Details section or title section?  And It will better understand if you give XML code.
Thanks 
Mahadi 

[sjmon3]

Data fields are in detail band.

but jasper extracts the correct number of rows but lot of them are null instead of the real value.

I'll try to plubish the xml

[sjmon3]

Attached in the first post  the code.

I revised it for change some values and name. But the structure is the correct one.