cant edit config+

sorry if this has already been answered,
in the ACP/ configuration+
im trying to change the settings for the registration information section, but when i click submit i get the following message
Sorry, your password can not be the same as your username.
Click Here to return to General Configuration
Click Here to return to the Admin Index
all other areas of config+ update fine apart from this
Regards Dave
in the ACP/ configuration+
im trying to change the settings for the registration information section, but when i click submit i get the following message
Sorry, your password can not be the same as your username.
Click Here to return to General Configuration
Click Here to return to the Admin Index
all other areas of config+ update fine apart from this
Regards Dave