The songs listed in the playlist must exist on your computer. Some playlists are lists of songs out on the Internet, and you can listen to the playlist, but you can't convert it. You would have to download each song to your computer before you could convert a playlist like that.
In other cases,...
Your computer may not have Windows Media support installed. To download and install WMA support, click here.
If that's not the problem and you purchased the WMA files from certain commercial sites like Napster, Wal-Mart or MSN Music Downloads, the songs may be copy-protected. Check the music...
OGG is slow to encode. However, you can speed up the encoding if you switch to "Specify settings" and select a quality level. 60% is the default and is relatively fast, although the file sizes are unpredictable.
If you are using WinNT or Win2k, please make sure you are installing the software in Administrator mode in order to get the file associations set up correct. Download the latest version here.
The right-click menu doesn't work with 64-bit versions of Windows. We do not have any updates that fix this problem. There are three solutions to the issue.
The easy solution
Download WOW64Menu from this link and install it.
You'll now have a new option called "Show Wow64 Menu" when...