I added a rule (flash file), specified the new flash file I want fiddler to respond with (use instead of the browser one). I've cleared my browser cache, and every time I play the stream, the browser flash file is captured again (instead of auto-responding) with the one saved already!!!
It used to work just fine, but now it appears as if the auto-responder (although checked) is not working at all...it's just a pass-through!!!
As explained in the forum post where you asked the same question
There are three possibilities:
1> The AutoResponder itself is disabled (checkbox at the top) 2> The AutoResponder rule is disabled (checkbox at the left of the rule) 3> The rule you've written doesn't match the target request's URL.
Sharing a screenshot of Fiddler might help me tell you which problem you're encountering.