Error when validating Script logic

Hi,

Im trying to validate a very sime script logic file. The logic i have written is

*XDIM_MEMBERSET ACCOUNT = RENT

[ACCOUNT].[RENT] = ACCOUNT.[RENT] * 1.1

*COMMIT

When I validate, I get the following error

"There is no base member in the selected members of dimension : ACCOUNT"

What could be the problem ...

Regards,

Prasanth.