我的也可以导出，要不行的话你看能否看懂，这是我用4.0的时候不能导出MP3时在CAKEWALK网站上找到的帖子，问题就解决了
"However, you CAN add a profile for LAME so that it shows up as one of your export options. Here's what you do (this assumes you have LAME installed on your machine somewhere).
1. Insert the Sonar 4 distribution CD-ROM into your drive.
2. Don't autorun. Instead, explore the CD.
3. Open the folder called Utilities.
4. Open the folder External Encoder Profiles.
5. Double-click on any of the encoder options you want to add (e.g., LAME MP3 High Quality Stereo.reg).
6. You'll be asked if you want to add this information to the registry. Tremble in fear for a bit because you're adding something to the registry, then click on Yes. You'll be informed that it was added successfully.
7. Go Program Files > Cakewalk > Shared Utilities.
8. Double-click on the EncoderConfig.exe program.
9. In the "Friendly Name" field, select the Profile you want (e.g., LAME MP3 High Quality Stereo)
10. Under Path, enter the path to the LAME encoder folder installed on your computer in place of the default path.
11. Double-check that you've entered the correct path, then click on Save. This is important!! Otherwise Sonar won't be able to launch the encoder.
12. Click on Close to close the External Encoder Config.
13. Now, open Sonar. When you go to Export Audio, any of the profiles you configured will show up as an export option."
