Renaming aliases using epma batch client

I suppose this should be opened under EPMA, but as i could not find a relevant subgroup i open it here.

I try to rename the default alias of a specific member by running the following command through epma batch client :

Update Member Properties(ApplicationName, DimensionName, ParentName, MemberName, Alias) Values('ApplicationX', 'DimensionX', 'PName', 'Mname', 'NewAlias');

but i keep getting the following message :

2014-04-01 11:42:35,755 ERROR [Line 6] The property "Alias" was not found.

I suppose the issue is that i am not using the appropriate property name for the Alias, so far i have used Alias and "Alias: Default", do you have any ideas about how this can be resolved?