please help

please help.

as i had to reinstall my wives website – it appeared now under my domain
http://www.me.com/mywive/subsite
instead of
http://www.mywive.at

to change this i changed the settings in wp admin/COMMON
in WordPress-Adresse
and in Website-Adress
(in both sides)
from http://www.me.com/mywive/
to http://www.myvive.at

now i am locked out

what can i do (where is the path to be corrected?)

nest regards,
jj