[Darryl Ramm]

No bit depth here is irrelevant.

Pro Tools is saying that it thinks that file is the wrong sample rate. And Pro Tools may well be wrong about that if the file has the wrong sample rate in it's header. You normally see this if you don't select SRC and the file is marked with a sample rate different than the session. I'm not following exactly what you are doing here when you see the dialog.

The way to make this work is for you to work out what you are doing wrong. Nobody here can really offer you any advice because you have not described anything you are doing in detail.

And again these sorts of problems are almost certainly caused by user mistakes, source files that are not the sample rate you think, including potentially source files with the wrong sample rate in their headers, etc. if you apply SRC to a file and it comes out the wrong duration vs. other files where you can line things up then you simply got something wrong. If you are importing to the clip list you won't be the first person to then pick the wrong clip and place it on a track. Have you tried this import before... make sure you are picking the .1, .2, .whatever file that is the correct one. Pro Tools just will not get converting sample rates wrong. If it did people would be screaming about it here (recent version(s?) seem to have issues with MP3 input at times causing clicks and pops but that is not relevant here).

At a minimum: Go back to the source material and play it outside of Pro Tools and confirm the sample rate. Create a new empty session and do nothing else in it except import the three files and import them directly to tracks. Try applying the SRC you think is correct, if that is not correct try applying none. And in any case where things don't line up use Pro Tools to measure precisely what that time change ratio is... is that 48/44.1? or some similar likely ratio?

If after doing that you are still stuck tell us what you see when you do all the above things.

And provide the usual type of expected info including:
What computer/OS version?
What exact version of Pro Tools?
What format audio file are you importing? Mono? Stereo?
What sample rates do you think these files are at? Why do you think that?
Where did the files come from? e.g. were they exported from a video? How?
What sample rate is the session at?