cannot download update

I cannot connect to a modem either. I have had no success downloading the update. Multiple tries but it will not download wirelessly. It will not connect to xbox live unless I download the update yet I cannot download the update. I connected wirelessly just
fine a couple days ago and now it will not connect. I think we need an update for the update.

Sorry about the reply delay, I had been drowning my sorrows in Fifa 12 and F1.

Firstly I tried all the suggestions in the first post, xbox doesnt recognise the CD/USB with the update.

taidara, my xbox is not close enough to the modem for a wired connection.

squishyNsmoo, the code is 351f-0000-0080-0300-8007-2741

TMH Army, It is a brand new xbox the first thing I tried doing with it is connect to xbox live, no previous updates installed, tried reconnecting, no difference and my friends are ps3 users.

AssassinG1997, just tried your suggestion, still the same outcome.

Mister Darcy, brand new xbox, no previous updates. error code is 351f-0000-0080-0300-8007-2741

and the connection to the internet seems to be fine its just downloading the update is the only issue.

Captain Poder, tried both of you suggestions, first one did not work because my xbox is new and there is no files in the marketplace cache. second just gives the same problem as before.

thanks for the suggestions but unfortunately I tried all and none worked, any another possible solutions? thanks in advance.

http://xbox.com/update explains how you can download an update ZIP file, extract it, then take the extracted files and either copy them to a USB Flash drive with 256MB free, or burn it to a DVDR or CDR.
Then, power off the Xbox, load the USB flash drive or the burned disc, and power up to run the update.

That is usually a network problem. You can try power cycling first by hitting your Xbox button and then moving right to.the system menu and selecting restart console. If that doesn't work then unplug every component of your network (modems, routers etc)
and leaving everything unplugged for 30 seconds and then restarting your Xbox again when your network comes back up. That should fix the problem. Come back and let us know if you need more help.

OP - can you try updating via a USB Flash Drive? Wolfman xTPx Jr - would you be able to detail your issue in a new thread? That would help us help you and the OP better