Removing specific attribute in Accounting proxy packet

Dear Team, I am trying to remove specific attribute "Framed-Interface-Id" from proxy accounting packet which do not need for the destination radius server. I put entry in attr_filter in mods_config as follows. *Framed-Interface-Id !* ANY* This is not working and the attribute is not removing still it is receiving. Kindly help me to solve this Regards, Nimesha