is it compatile with 1.7.2?
Because I already got it, but it doesn´t work...
It's working on my demo site (oxwall 1.7.2) at http://oxwall.rayzzz.com/rzradio
Please test it there and let me know which problems you have with Radio on your site.
If you mean the fact that categories vanish after some time, then this problem is fixed in 7-th build. You can download it from product's page