Unable to set the column values in Standard alv settings

Hi,
In the ALV displays settings  screen, I can set any number as "number of columns displayed", press "apply"  it remains 8 columns that are visible.
Prevousely its working fine, last two days back i added  two fields in that AlV table. after that i am unable to change column values in ALV settings.
Can any one tell me how to resolve this issue.
Regards,
Dhananjaya

Adding fields should not affect the settings normally.. is your program fully activated and you have not mentioend any settings explicitly in your code rite?

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