My b2evolution Version: Not Entered

Hello.

I activated RSS in my blog and it works. But I wish change the URL from it. The actual URL is set to example.com/?tempskin=_rss2 and I want to be example.com/rss/.

I already have looking the codes but still having problems to change. Anyone knows the correct way to change the RSS URL???

PS.: I don't wanna use a Frame.

;-)

Thanks