I have a Green LG Rumor from Virgin Mobile

I just made a ringtone on Ventones which was "If I Were A Boy"

and when I sent it to my phone I did get the text message but

it said Access Denied.

This happened to me many times, I don't know what seems to be

the problem. At first I thought it was because I didn't have a memory chip

But now that I do have a memory chip and it's still doing it.

Can you please help me with this problem?