Leave the original google account in the phone and create a new one. After you connect to market several times without error you can delete the second account from the phone.

 

did you pull the batt and try again before doing anything ele.

 

After Sprint replaced my Moment and all the updates completed, I was unable to access the Market, after many hours and B.S. advice from Sprint Tech Support, they upgraded my phone to a new one, but let me keep my old phone. So not one to let something just drop, I decided to try a few things, the one thing that worked was to go into settings, Manage applications, located the Market app, open and a button was labeled "Uninstall Updates". I did this tried the Market and it worked with no problem.

Give it a shot.

 

I got a LG optsisum and I'm using andriod market online on my laptop, but I press download but they won't download to my phone what's wrong and what do I do