Can't change my domain name .. error

[ptcmm]

I want to change my domain from ptcmm.PCRiot.com to ptcmm.ExoFire.net .. but I always get this error :

An Error Has Occurred

Whoops, it appears that there was an error modifying your domain. The errors are listed below.​

• Whm error: account package id no longer exists in the panel. (code modifydomain_1)

You may attempt to correct any errors that occurred after continuing.

Can you please chenge it for me manually?
thanks .​

 

[Christopher]

I have changed your domain.