Use dbisql to connect to 32-bit applications from the command line.
To connect to a 32-bit application without using a data source, use dbisql to connect from the command line. To connect to the demo.db you would use a command similar to this:
dbisql -c "UID=DBA;PWD=sql;AUTOSTOP=no; ENG=<engine name>;DBF=%ALLUSERSPROFILE%\SybaseIQ\ demo\iqdemo.db"