@raki - Did you highlight all clips in the track? Are the clips muted in any way? IIRC, if you bounce a muted track, it generates a silent clip. It can be a bit difficult to post in the Cakewalk forums because they always expect you to "RTFM" on something like this... you might be suspected of using a "less than legal" copy of Sonar.
@Fretduster - usually, bundled software have upgrade paths that offer substantial discounts so this is the best way to "join the club", ika nga. Often, bundled software offer less track counts than full software but the functionality is the same. Don't worry much about adat and spdif if you don't use it much.