Make sure that EasyChair is able to match your new account with
your old account. EasyChair does this by matching your email address,
so make sure to supply the same email address as the one you gave when
submitting your paper! It is the same address at which you will
receive the current communication. If you already have a new EasyChair
account (from another conference), then log into EasyChair and use
Other -> My Account -> Merge Accounts
for merging.
To apply for a new account, go to
http://www.easychair.org/ESWC2007.