[simon.colemanhospedia.co.uk]

In addition connection ti the TCP/IP client over rides the 3G signal and effectively blocks Internet use.

You can only connect to 1 source at a time & wifi is used preferentially - you won't be able to use the native 3G on the ipad at the same time.

Either switch between the two (disable the ipad wifi) or if simultaneous access is a must then you need to get a separate wifi router with a 3G sim. Check first that your current nmea wifi server can join a different network (but most can).

simon