how to use Cellular Shield with SM5100B

sorry dude
When i compile i get following error

C:\Program Files (x86)\arduino-0018\libraries\NewSoftSerial/NewSoftSerial.h:71: error: 'virtual void NewSoftSerial::write(uint8_t)' is private

error: within this context

and it indicates on this row
cell.write(26); // this is ctrl-z