Recording through a PC with a POD HD500x

[postmortem722]

Okay so as a graduation present, I was given a brand new POD HD500x
All I have is one xlr cable which fits but doesn't go all the way into my headphones (the 3.5mm) because of the way they were designed to have a skinnier cable (but still 3.5mm) fit (they are skull candy crushers) 
Anyway, I use reaper and FL studio (not both at the same time, just alternate)
and I want to record, and I set up the pod with my computer and got everything installed and the tone editor, but you see when its connected via usb my computer playback and recording devices are switched too it meaning I can't hear a damned thing even through reaper, so I get no playback of what I record, and even after I disconnect everything i still don't get any playback.
If I set the playback device to my headphones as default and leave the pod as defaut communications, I can hear everything from my computer just fine, but I still can't hear my guitar through the pod.
I did think of routing it through an amp and then back to my computers input, but I have a horrid motherboard that doesn't handle impiedence very well. I know this because I use to record with Guitar Rig 5.
Basically, I'm looking to see if there's something I'm doing wrong, or an alternative because I'm impatient and have to wait a few days before I can go out and get a 1/4 jack adapter 
Shouldn't you just connect it with usb and everything is fine?
In Reaper, I set the sound drivers to Asio and selected the Pod's drivers so the input is proper 
it just seems the output of the sound still goes to the pod? 
 

[Triryche]

You need to monitor through your pod, it becomes the sound card (connect speakers and/headphones directly to it).

There may be work arounds, what OS are you on?