BTW I just noticed the original msg seems to refer to the program login, if it makes you feel any better I'm an affiliate and I can't login either.
Internal Server Error
The server encountered an internal error or misconfiguration and was unable to complete your request.
Please contact the server administrator, root and inform them of the time the error occurred, and anything you might have done that may have caused the error.
More information about this error may be available in the server error log.
CCBill/1.3.29 Server at affiliateadmin.ccbill.com Port 443