SMS Problem: (Unknown Format)

[RRibeiro]

I have a Qtek 2020 with WM2003SE 2.20.07.
When I send one SMS, to someone with a "normal" mobile phone, the person that recieves the SMS can't read it because alway gets one error saying "Unknown Format".
What is is problem?
Can it be fixed?
How?

Thanks

[cruisin-thru]

Try going to inbox, choose sms as your account, click tools then options...click accounts then click sms in the large box, you will see the service centre number, below that it says "send sms using unicode...try unchecking this.