SMS Failed on Blackberry

Well today i just face this problem ,,when i was sending my message on my 8520 i received the message that stated "sms transfer rejected" so the solution for this problem is :

• You have make sure the number of your receiver number is correct ,
• check if there is any double subject(name) but different number
• Delete the wrong one

So if u do those three steps it should fixed your problem , if the problem still occur pls check your SMS service center numb,,or it your connection error from your provider,,
Thank U --