How to trade Natural gas?

I tried to trade it this morning using symbol "NGU6" and "@QGU6", even using the market order, they did not go through.

7/31/06 9:37 STO 2 NGU6 at market DAY Canceled 7/31/06 9:41

7/31/06 9:27 STO 2 @QGU6 at market DAY Canceled 7/31/06 9:32

7/31/06 9:25 STO 2 @QGU6 @ limit 7.83 DAY Canceled 7/31/06 9:27

How to trade Natural gas in C2? Thanks

The natural gas market was not open at that time (I don’t think). Next time use GTC orders that’s all.