Sound like a broadcast wav (BWF) file with meta data. This type of file use the same .wav tag. Use a program such as Audiofinder to veiw the file, it will show if its BWF and if that is the case, use the conversion section of the program to strip the meta data ( which turns it back to basic wav file ) this may help.
Also, Did you create the audio files your trying to import or are these files from sample libraries or from another project.
Thanks for the rapid response. I downloaded the application which I have to say is very good. I dont think the file is a BWF but i've copied the 'Meta Data' bellow.
The only thing I see that is out of place is that they are Acid Wave would conversion solve the problem? They are stems I have bought.
— File Properties
Sample Rate: 44.1 kHz
Size: 2.75 MB
Created: 17/05/2010 14:20:46
Modified: 17/05/2010 14:20:46
— Acid Wave
Number of Beats: 32
Loop Mode: Looping
Root Key: C#
Time Signature: 4/4
The sample rate of the file MUST match the sample rate setting of the project. This sounds like a 44.1 vs 48 kHz mismatch.
Either 1. set the project to match the sample rates of the audiofiles, or 2. convert the audiofiles to match the projects sample rate.