I reinstalled BIAB in a test folder with the latest update (2009.5 build 288) as Andrew suggested. I'm getting the same results. However I might have found a work around. Again when I choose any song with a soloist in a paticular styles folder all instruments other than soloist play back as displayed at the top of the screen. When I look at the memo for a song usually it displays a SAVED soloist patch and an EMBEDDED solist patch for that song. When I go to the S solist button on the tool bar and open the instrument displayed is usually what I hear, although it does not display properly at the top of the screen until I push the OK button while in the soloist drop down screen. This only occurs when I use an external midi divice like the Ketron SD2 or my Yamaha S-90.
Dxi synth plays as displayed in the DXI drop down menu. When I change to a different song within the same styles folder the soloist instrument that is displayed sticks to the previous song setting. All other instruments change and play properly. I guess I could do this for each song although I'm a little surprised that the soloist patch doesn't seem to change unless I do the above or change the patch using the + button. I assumed the soloist would change like all the other instruments and be displayed properly when I go from song to song. Is there a setting I'm missing??