Sending data through GPRS on a static IP

I am trying to send data through GPRS/GSM modem which has SIM900 modem module. I have the sim card of vodafone. The commands I am giving through the Hyper Terminal are

at+cipshut
at+cgatt=1
at+cgdcont=1,"IP","portalnmms"
at+cstt="portalnmms","",""
at+ciicr
at+cifsr
at+cipstart="TCP","xx.xxx.xxx.xxx","xxxx"
at+cipstatus
at+cipsend

Click to expand...

The problem I am facing is that the response to the commands at+cgdcont and at+cipstart is ERROR.
Can anyone tell me the exact commands for SIM900?

Will this help? http://wiki.peternixon.net/index.php/Advanced_GPRS_Modem_Usage

Capitalization my be an issue too especially AT.

Capitalization was indeed a problem with the APN.
After I wrote AT+CIPSEND I did get i prompt '>'. after typing some data I pressed cntrl+z. I got the response 'Send ok'. Now I have purchased a static IP on a VPS. With these commands I know I have made a TCP packet of my data. How do I find this data on the other end? Is there any way I can send my data in HTML format?