Recently, I placed a DoubleClick Floodlight tag in DTM and it wouldn't fire off after it has been approved.
I was told that the 3rd party code was implemented incorrectly.
Here's what support said:
Might be better if you email me directly, so we can better understand what you're trying to accomplish and what your constraints / requirements are for these types of tags. It's easy to add them to DTM, but if you require a specific method of inserting the code to your pages, there might be one or two quick other steps involved. Let me know.