Canon iR 2520 printing problem

[aco.bk]

Hi,I am getting an error when try to print more than 200 pages on iR2520.Machine print about 5,6 copies and than it stop printing .Spooling is ok but on LCd screen there is a message ,,waiting to print,,.when spooling is finished,there is still a message,,waiting to print,,.Machine sounds like it supplies toner but toner is ok (toner bottle is full and develop too).It has installed ps kit,but im not sure if `someone who did that(install PS kit)` done the memory upgrade.machine had newest system software.How to view capacity of installed memory?Any advice ,please?

[northernlife]

was a toner stir done at install?

[aco.bk]

yes,it is ok.I try to empty develop unit and run toner suplly .Toner supllyis ok.