I presume you have #include “FreeRTOS.h” and #include “queue.h” in you source file? Are you building queue.c as part of your project?
I suggest taking the demo project details on this page http://www.freertos.org/port_PIC32_MIPS_MK4.html as a start. There are both MPLAB 8 and MPLAB X project, and it includes a simple blinky demo that uses a couple of tasks and a queue. When that compiles (and runs) you can take the demo code out, leaving the FreeRTOS source files in, and add in your own code.
Your queue is created to hold 8 bit types, and when you send data to the queue you pass it a pointer to a 32 bit type.
You are sending the letter ‘A’, which is ascii 65, so I would expect to receive decimal 65, not hex 66, but that might be something to do with the mismatch in types.