Simple Question--Ping

Hello, I am implementing a telemetry module with the GL6100 modem, but I can’t do a simple AT+WIPPING operation! I already have the WIPSOFT plugin (V5.41), and I try the example of a PING on Hyperterminal, but I always get either an CMEE 819 error or a WIPPPING 1 0 0 code.

Code entered at Hyperterminal, with the responses

AT+WIPCFG=1
OK
//start IP stack
AT+WIPBR=1,6
OK
//open GPRS bearer
AT+WIPBR=2,6,11,wap.comcel.com.co
OK
//set APN name of GPRS bearer
AT+WIPBR=2,6,0,COMCELWAP
OK
//set user name
AT+WIPBR=2,6,1,COMCELWAP
OK
//set password
AT+WIPBR=4,6,0
OK
//start GPRS bearer
AT+WIPPING=”www.google.com”
OK
//Long delay...
+CME ERROR: 819

Is there a way of knowing if the GL6100 is correctly connected, other than pinging?

Thank you for your time!

Note that some network providers block Pings