Cannot open WMA file in Adobe Soundbooth CS4

[chnine]

Using an Olympic WS-210S digital voice recorder, I recorded an interview. I then transferred it to my MBP (it copied over as a WMA file). Windows Media Player will play the audio clip but I wanted to improve the audio (it's a little noisy) and so I tried to bring it into Adobe Soundbooth CS4 ... but Soundbooth will not open this file. I had read that Soundbooth was supposed to be able to open WMA files.

Any thoughts on why this might be?

Thanks.
Christina

— For what it's worth, I found another way — by converting the WMA file to an AIFF using Switch. I then opened AIFF in Soundbooth and can now edit the audio.