Real are *extremely* protective about their software - hence your problems when you start lookin around.
You might try need RealOne player on your Ax (I use it on my X51v). There isn’t an installer for WM5 yet, so the easiest thing to do is get the .CAB file, drag it to your device and doubleclick it there to install it. You can get the .CAB file here:
http://www.winmobiletech.com/sekalaiset/realplayer.cab , or just google for ‘real player cab for wm5’
Hope this helps, Kronalias