I was promise a first month free trial with gold and my account is new

Every new console will give the first three profiles created on it a chance to get the 1-month free trial of gold. If you do not sign up and accept the free trial when it appears, it will not show up again for that profile. Your only options are to pay for
gold, or start another new profile and get the gold trial with that account. Sorry.

[quote user="DrHamad"]

...a new xbox 360....1 month free gold membership??how can I claim that???

[/quote]

By creating a NEW Gamertag ON THE CONSOLE ITSELF. The one month free trial is only for new members joining through the console. If you create a new Gamertag on the Xbox.com website and recover it from LIVE you also do NOT get the free month trial. And only
the first three Gamertags joining Live on that console get the free trial month.

The free month of Xbox Live gold can be applied from the account creation process if you are making a new account.

Or

If you already have a Microsoft account and don’t have an active Xbox Live Gold paid subscription, you may be able to sign up for an Xbox Live Gold one-month free trial subscription.

Here’s how to sign up:

1. Sign in to the Subscriptions page with your Microsoft account.
2. If you’re eligible for a free trial, you’ll see Gold – 1 Month FREE Trial as a subscription offering. Select Gold – 1 Month FREE Trial, and then select Next.
3. If prompted, add a payment option to your account. If you already have a payment option on file, you can use that.

Important At the end of the first (free) month, your trial subscription automatically turns into a paid Xbox Live Gold subscription that renews monthly by default. The paid Xbox Live Gold subscription will renew to the payment option you
added to your account.

If you don’t want the Xbox Live Gold one-month free trial subscription to renew, you must cancel it. See “How to cancel an Xbox Live Gold trial subscription,” below.

For more info go
HERE.

The only way you may redeem the free month trial is when you create a new account on the 360 console.

This is limited to the first three accounts created that opted in for the free one month trial.

It means you are a gold account, where the one month free trial is for new silver members only.