This message means that you have entered the wrong Handheld Contact username and/or password.
To correct this:
If you happen to see the message "addUserInfoSyncDisplay Table: Column 'ID' is constrained to be unique. Value 'ACCOUNT NAME' is already present', please follow these instructions to resolve it.
If you do not know the password for Handheld Contact then it may need to be reset. To reset the Handheld Contact password, please click here.