When I use JMETER transfer character will automatically add g?h H

When I use JMETER transfer character will automatically add g?h H

While i am using cvs data config,I want to enter an user name and password
to login to the server.But the automatic adding always have "?",it makes
me mad.I am so sorry, my English is not very well.
In cvs I hava input this data,user:123456,password:11111

but while automatically adding, it add "?" in front of my user to make me
fail in logging.