Migration Toolkit: Unknown initial character set

[James Eaton]

I'm attempting to use the Migration Toolkit to migrate an Access database 
to a MySQL 5.0.45 server running on Windows Server 2003.  The default 
character set on the MySQL server is latin1 with default collation of 
latin1_general_ci.

I get the following error when connecting to the remote MySQL server:

Unknown initial character set index '48' received from server. Initial 
client character set can be forced via the 'characterEncoding' property.

Can someone explain the error and how exactly to work around it?