gprs tcp not connected using sim900d

[engineer khan]

i use all code from datasheet and also taken from net every command gives right response as desired but i type AT+CIPSTART="TCP","xxx.xxx.x.xx","xxxx"//ip and port
the response should be ok connect ok
but it gives ok and after a while it gives +pdp DEACT or status IP or connection fail what can be the solution please
o am using sim900d,rs232 hyperterminal,wish to communicate through tcp,APN,NAME ,USER name, DOmain Ip STATIC IP all things are known

 

[xpress_embedo]

Where is the server??
xxx.xxx.xxx.xxx
Have you opened the port xxxx on the server.

The most common problem is that, most of the individual don't have public IP address.
The IP Address must be public and the particular port must be opened.

You can get public IP address by connecting a Data Card to your computer and then using a Software like HW Hercules to open a particular port.
Check your public Ip by searching on Google "What is my IP"