Simple Authorization Problem

I know I'm missing something obvious and most likely just need some sleep to figure it out,but I'm trying to finish a block of auditing code off to hit a deadline. I can't figure out why I get an error when I try to do the following:


CREATE USER audituser WITHOUT LOGIN

GO

CREATE SCHEMA audit AUTHORIZATION audituser

GO

EXECUTE AS USER = 'audituser'

GO

--Create new, flexible audit structure

CREATE TABLE audit.AuditTable

(AuditID int identity(1,1),

TableName sysname NOT NULL,

AuditAction char(2) NOT NULL,

RowData xml NOT NULL,

AuditDate datetime NOT NULL CONSTRAINT df_table1_audit_editdate DEFAULT (getdate()),

AuditUser varchar(30) NOT NULL CONSTRAINT df_table1_audit_edituser DEFAULT (suser_sname()),

CONSTRAINT pk_table1_audit PRIMARY KEY CLUSTERED (AuditID))

GO


The user and schema are created properly. audituser is the owner of the schema and therefore should have the authority to do anything at all within the schema. However, the create table statement is failing and saying CREATE TABLE permission denied. Why?