Hello all, -- ever grateful for replies =)

I've tried encoding rnig tones in various ways, sending them to a phone with for example AT commands (one example in the smart messaging FAQ, the other does not), with mixed results. I also tried sending tones with text sms's. Below is a simple example (one single note):

//SCKL1581 024A3A4DBDB99404000518450000

My phone (which is of the 8xxx-series) recognizes this as a ring tone, however:

When played, the phone produces no sound although the vibrator goes on (yes I do have sound enabled).

Any suggestions that would help me out of this misery?