Flex/Actionscript: Unable to add archive file

I have an Flex 4 application that I am developing in Flash Builder 4. I'm trying to use a library developed by a coworker, which was delivered as an SWC.

I added the library to the Library Path in the project properties. Component set: MX + Spark, Framework linkage: Merged into code.

When I attempt to instantiate a component from this library, I get the following error:

unable to add archive file: [library].swc$locale\en_US\..\..\resources\images\AcceptButton.png (The system cannot find the path specified)

When I unzip [library].swc, the image does exist in .\resources\images\AcceptButton.png as I would expect.

Any suggestions to go about resolving this would be much appreciated.

Your best bet is probably to get the uncompressed source code and see if you're having the same problem. It's difficult to guess at what's going wrong inside a swc file. It should function the same way as the SWC.