How to track the traffic of a program that works through a proxy through Fiddler?

Question

System administration

Hello guys!
I have a program (Walker on the site) in this program, an account is inserted that works through a proxy, but fiddlere I do not see requests for this account, as I understand it, due to the fact that it works under a proxy. If I run the program without a proxy, then fiddler sees everything. How to make fiddler listen for traffic that goes through the proxy? And is it even possible? Thank you!