my mobile device(seimens c45) cant resive sms when it is connected to the now sms server but whn i disconnect it it reseavice the messages so can any one help me please
Do you mean that your device does not receive SMS messages when it is connected to NowSMS as a GSM modem?
If you have "Receive Messages" checked in the properties for the GSM modem definition in NowSMS, NowSMS will automatically pull the messages off of the GSM modem as they are received.
We call this the "2-way" feature of NowSMS, which is described in more detail at the following link: