Error while trying to change the main domain

[rubiccube7]

Hosting Domain Modification
submitted June 28 at 7:21 am
vOneDI5NWTtp
action status
Error
information
A change to your hosting account's primary domain.
result
A system error occurred while processing this action.

Error Code: 1E9F63B0

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the domain currently is vinu91.co.cc

i want to change it to vinu91.x10.bz

i am getting this error while trying to change my main domain of my account.

Can you please look into this, and resolve this error?

thank you,
Vinu