How do I get my name only as payee on my disabilty checks.

I am 27 yrs old and have been blind from birth but have some sight in my right eye. I recieve a disability check each month from social security. The check has my mothers name as payee along with my name. I have tried several times to have my name only put on as payee but have been told that I can not have my mother's name taken off without her permission and if I were to have that done then they would have to appoint me another payee. I have no developmental disabilties I am just blind, so I don't understand why I cannot handle my own affairs.