Report parameter definition

Hi,

There is a absence start and end date in the absence used report I created.and when i select start and end dates i want to see absences in that range

this is how i defined my report parameter:  AND TO_CHAR ((anc.START_DATE), 'dd.mm.yyyy') BETWEEN :P_BASLANGIC_TARIHI  AND :P_BITIS_TARIHI

anc=  ANC_PER_ABS_ENTRIES

:P_BASLANGIC_TARIHI  = START DATE

:P_BITIS_TARIHI= END DATE

However, I select a range in the report, but it is not reflected in the report even though there is absence. But when I remove the parameter definition I can see.