Free radius external shell script problem

I am using it for user authentication Under Authorization using "update control" and running a script to get the "Accept" as Athuntication type Script has " httpasswd -bv testpassfile $username $password" Script run ok with one option -b or -v but do not run with both option -bv or -b -v. Httpasswd use -bv for verify user and password and get both values from command I will be grateful for the help in this matter Regards