1.21 fixes virtually nothing... It still claims to fix the broken browser wich the previous was supposed to fix because the patch before that said it would fix it but made it even worse because the only release of BF2 with a working browser was the demo...
However 1.21 fixes almost none of the 48 new bugs introduced with the 1.2 patch that fixed almost nothing that the patch before that 'unfixed'.
Errr back on subject... Why not start BF2:SF directly and have it enabled directly... Or does the thing with the sound happens when you do that too?