安装GoldenGate错误OGG-01756

遇到这个错误的是最新版本GoldenGate v11.1.1.1，网络上查询了下似乎都是这个版本遇到的问题，怪了。
GGSCI (WIN1) 41> ADD EXTRACT ext_01, TRANLOG, BEGIN NOW

2011-08-13 12:52:58 WARNING OGG-01756 Cannot register EXTRACT EXT_01 with database because of the
following SQL error: OCI Error ORA-06550: line 1, column 3128:
PL/SQL: ORA-00942: table or view does not exist
ORA-06550: line 1, column 3117:
PL/SQL: SQL Statement ignored (status = 0). See Extract user privileges in the Oracle GoldenGate for
Oracle Installation and Setup Guide. You can manually register this group with the REGISTER EXTRACT
command.
EXTRACT added.

GGSCI (WIN1) 44> register extract ext_01 logretention

2011-08-13 12:58:09 ERROR OGG-01755 Cannot register or unregister EXTRACT EXT_01 because of the
following SQL error: OCI Error ORA-06550: line 1, column 3128:
PL/SQL: ORA-00942: table or view does not exist
ORA-06550: line 1, column 3117:
PL/SQL: SQL Statement ignored (status = 0). See Extract user privileges in the Oracle GoldenGate for
Oracle Installation and Setup Guide.
看提示说是没有权限，不对呀，刚刚明明是已经授权了dba的权限了，怎么还不行，无解，继续google（OTN forums维护中，没办法），终于在一个老外的一篇文章中提到了类似的问题。
register extract是11版本的新特性，需要使用sysdba用户来操作，这不是坑爹嘛。
操作提示成功：
2011-08-13 13:24:39 INFO OGG-01749 Successfully registered EXTRACT EXT_01 to start managing log
retention at SCN 574509.
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