That may be the reason of the error 96. Unfortunatelly GSM doc does not describe in details what does error in range 0-127 mean. It just says that such erros are simple "Network error".
Set the correct SC number and I'll check why it was reseted to an empty string.
P.S. Sorry I am anwering on english, but a lot of users read this forum so I am trying to make my answer for each problem to be usefull for others as well.
