DOJ from date and to date , DOE from date and to date parameter not working in BIP report

Hello ,

I have create Date of Joining date parameter and Date of Exit parameter, however when user try to select dates and filter records , records are not getting filtered .

Below is parameter code :

AND ppos.date_start BETWEEN :From_Dat AND :To_Dat

AND ppos.ACTUAL_TERMINATION_DATE BETWEEN :p_date_from AND :p_date_to

Also attaching entire report query