LG

My mother, when trying to type an outgoing text message on her LG200C, gets the error of "Exceeds Available Space". The weird thing is, she gets this message when she tries to type the first letter of the outgoing message, she is not even attempting to send the message yet. I have walked through with her deleting all of her outbox, inbox, and saved messages. Has anyone seen this problem yet with the LG200C. Thanks for anyone's help.