Domain Name Change Error

[no-half-measures]

On trying to change my main domain name via the X10hosting Contro Panel i recive this error;

Hosting Domain Modification
submitted July 6 at 9:09 amnHqVN74x6Fh5action statusError
informationA change to your hosting account's primary domain.
resultA system error occurred while processing this action.

Error Code: F3F45C7A

im trying to change it from;

silent-ghosts.x10.mx

Too

unrealss.x10.mx