This most likely means that you have defined the resources folder incorrectly.
Some things to check (which you have most likely done): 1. Ensure you have defined the location of your resource folder 2. Ensure that your src is pointing to the correct location of the resources
From experience: If all static files are returning 404 then it was the definition of my resource folder location that caused the problem (e.g. calling css/one.css isntead of resources/css/one.css). If select few static resources then it is very likely your src when calling these files that is incorrect.
Best I can do with information currently supplied. Please include your config setups so that we can help pinpoint better.