Still having problems with playing Real "rm" files

I have build 100.808 of BSPlayer installed, and I have the Real Player Alternative 1.22 installed. I can play "rm" files using the classic Windows Media Player 6.4.8.1 that installed with the Real Player Alternative.

But when I try to open an "rm" video file with BSPlayer, it just pops up an error box that says "Can't open file".

I tried searching the forum, and found the thread that said to go to my Windows XP "Run" box and enter "regsvr32 RealMediaSplitter.ax", so I did that, but it didn't help. (Actually the post referred to "rmsplitter.ax"...is what I have the same thing? I don't have an rmsplitter.ax file...)

Any other help? This is such a great player; it's playing everything else I throw at it just fine...except "rm" files.