using EXECUTE IMMEDIATE to run DBMS_STATS.GATHER_SCHEMA_STATS



When I run the block below, in oracle 10.2.0.3.0, I get the error
shown after. Is this a problem with my coding or is it just not
possible to run this commad in pl/sql?

Thanks

DECLARE
v_dbms_stats VARCHAR2(200):= 'EXEC
DBMS_STATS.GATHER_SCHEMA_STATS( ownname => ''LOAD'',
estimate_percent => 100, cascade => TRUE,options => ''GATHER
AUTO'');';
BEGIN
EXECUTE IMMEDIATE v_dbms_stats;
END;


ERROR at line 1:
ORA-00900: invalid SQL statement
ORA-06512: at line 4
.