Xbox Live Gold Membership Free Month Trial Not Working For Multiplayer.

Yes, you certainly can. The bottom of a 2 Day Gold Pass states the following:

XBOX LIVE 2-Day gold Membership, free trial allows access to these Gold features: online multiplayer gaming, Netflix, ESPN on XBOX Live, Facebook, free game demos, exclusive discounts, promotions and video content.

Free 2-day trial offer is only for use on the XBOX 360 and is not valid for current XBOX Live Gold Members. At the end of your 2-day trial period, your membership will default to the FREE XBOX Live Membership, unless you elect to extend your XBOX Live Gold
Membership.

Now what this doesn't tell you is that you cannot play in ranked matches with the trial membership, but you are free to play in social matchmaking playlists for games.

Hello mwnance,

You have a free 1 month xbox live membership and it is a trial right?

If it is a 1 month trial, then it isn't a Gold membership, and will not give you access to Gold features. It will only grant partial sample access to certain features. That goes for all trial memberships 2 day, 14 day, etc.

[quote user="DocxChaotic"]

My profile has a free xbox live gold trial, but I dont know where I go or how I activate it.

[/quote]

You should check out this support topic:
http://support.xbox.com/en-US/my-account/xbox-live-membership/trial-gold-membership

The Xbox Live Gold One Month Free trial memberships section should be able to help you.

Sincerely,

z

When you sign up to Xbox LIVE, you have the option to choose the Free Membership which activates a One Month Free Gold Membership trial. If you did not choose this option then you will have to create another account if you wish to have a month of Gold Membership.

If you did do that, you can check Passport.net or go onto the Xbox LIVE Dashboard and into Account Management to see if the Gold Membership trial has been activated.

In general, Smwutches is right, paid Gold membership is required to play online multiplayer. Exceptions include promo periods (free Xbox LIVE Gold weekends), trial cards (I've never seen any above 48 hrs), the free month trial for setting up a LIVE account
for the first time, and perhaps this situation...

IF you set up a LIVE account (without paying for membership) for the first time a month ago and you weren't using a trial card , then you were probably under the free month trial of Gold membership. All profiles get this free month for setting up LIVE for
the first time. Although, I think your status would've shown as Gold until it ended...

If, however, as I suspect, you've already used up that free month for setting up a LIVE account, weren't using any trial cards and thus your LIVE status is Free/Silver, then check out the following thread for others who experienced the same thing. Unfortunately
no one seems to know why it happened. Perhaps it was a glitch or a quiet/secret promo?

http://forums.xbox.com/xbox_forums/xbox_support/f/9/t/8159.aspx