Error Message

I used to used Cakewalk Home Studio 2002 for very simple purposes:  play single note (no chords) vocal lines of choir music for each vocal part.  September 2010, my PC died; I got a new PC and upgraded to Sonar LE.

Took me months to figure out the keyboard midi setup, but finally got it.  Recorded vocal parts for 4 songs.  Last time around, S/LE would not play my last entry.  Turned out to be recorded okay, S/LE just stayed silent.  Now, I try to record again. 

Cannot get any sound, not recording the notes on the staff; S/LE died with this error message:

                                 "SONARESL.exe has stopped working" 

and the program closes.  Do I need to reinstall it?  I have the downloaded files - maybe it'll be easier the second time around....

Any advice?

 - Rita.