I get the same error (BASS_ERROR_ILLPARAM) when I try to listen whatever real audio station (i have already installed real player 10).
An example of one real audio station could be BBC-4: http://www.bbc.co.uk/radio4/realplayer/media/fmg2.ram (or rtsp://rmlivev8bb.bbc.net.uk:554/farm/*/ev7/live24/radio4/live/r4_dsat_g2.ra/streamid=0;seq=0;rtptime=0)
Do you know what is the problem?
== Edited
Ok, I haven't see the other post refered to this error, where is specified that there is no support for RA format because it is not open format. thx!