permissions xp_cmdshell

Hi!!!
which permissions are necessary to execute xp_cmdshell?
-->without being SA
Error:
Msg 50001, Level 1, State 50001
xpsql.cpp: Error 87 from GetProxyAccount on line 604
tanks!!!You will need to set up a proxy account first using
"xp_sqlagent_proxy_account". Then you should get the permission associated
with the account you "set" up as your proxy account.
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"Joao Mossmann" <mossmann@.feevale.br> wrote in message
news:%234YPh1rLEHA.1556@.TK2MSFTNGP10.phx.gbl...
> Hi!!!
> which permissions are necessary to execute xp_cmdshell?
> -->without being SA
> Error:
> Msg 50001, Level 1, State 50001
> xpsql.cpp: Error 87 from GetProxyAccount on line 604
>
> tanks!!!
>
>|||Heres what Ive done in SQL 2000. RClick the SQL Agent/ props/ job system/
uncheck Only users with SA bla bla.../ fill in appropriate credentials. Most
imprtantly, DO NOT set permissions on xp_cmdshell itself.
"Joao Mossmann" <mossmann@.feevale.br> wrote in message
news:%234YPh1rLEHA.1556@.TK2MSFTNGP10.phx.gbl...
> Hi!!!
> which permissions are necessary to execute xp_cmdshell?
> -->without being SA
> Error:
> Msg 50001, Level 1, State 50001
> xpsql.cpp: Error 87 from GetProxyAccount on line 604
>
> tanks!!!
>
>sql