I have a Motorola Razr V3xx, and when I got it about a month or two ago, everything worked perfectly fine. But the 2 weeks in, suddenly, I couldn't apply a lot of the ringtones I have as a ring tone. I am aware that the limit is under 600 kb, and all the ringtones I have on the phone are under 600 kb, and I can't apply them. It seems the only ones I can set are under 300 kb or so. Can someone please help me on fixing this problem?! It's bothering me much so.

Thank you all! All help is appreciated.