Blackberry Bold 9700 Send SMS Problem?

Bright S

New member
My Blackberry Bold 9700 I am having problem sending SMS Sometimes. Normally send a SMS with my contact no problem and sometimes some contacts after sending few SMS then do not let me send SMS to that Contact again. After Hit SMS go back to my contact screen.

If I change the phone number no problem but same phone number problem until that contact sms me again then problem go away. This means have to wait until get a sms otherwise can not send sms again to that contact. Can anyone tell me the problem?? I do reset but do not help.
 
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