[Koha] table systempreferences is not updated

[Eric G. Salayon]

hi,

  here i am again, seeking for your help. im adding a system parameter in
KOHA (V2.O), but after saving the record it doesn't appear (the record
i've added)eventhough it confirmed it adds a new record. What i did was
to browse the log file (koha-error_log), and found out that field
'explanation' was causing the error.  i opened the table
systempreferences and saw that there are only 2 fields: variable and
value only. but when i checked the file systempreferences.pl, it was
select few more fields like 'explanation', 'type', and 'option'. What
are the data types of these fields? another is that the
systempreferences.pl only displayed 3 fields to update namely variable,
value and explanation, can i have your updated systempreferences.pl
file... TIA!

eric