windows7用TCPOptimizer改MTU之求救

怕大家看不懂我的問題，把我用TCPOptimizer得參考方法貼上來了
http://www.dotblogs.com.tw/jeff-yeh/archive/2009/03/22/7643.aspx

在網路上搜尋到的TCPOptimizer改MTU值方法大多適用於舊型系統如(XP.2000.98)
然後我的電腦是WINDOWS7系統

我也有照文中的方式去做
跑出來的數值是:
TCP options string = 020405ac0103030201010402
MTU = 1492
MTU is optimized for PPoE DSL broadband. If not, consider raising MTU to 1500 for optimal throughput.
MSS = 1452
MSS is optimized for PPPoE DSL broadband. If not, consider raising your MTU value.
Default TCP Receive Window (RWIN) = 66792
RWIN Scaling (RFC1323) = 2 bits (scale factor: 2^2=4)
Unscaled TCP Receive Window = 16698

In Windows 7, unless "TCP/IP Auto-Tuning" is disabled, only the Current TCP Window is displayed. Use the latest TCP Optimizer for tweaking.
RWIN is not fully optimized. The unscaled RWIN value is lower than it should be. Also, RWIN being close to and above 65535 does not justify the header overhead of enabling TCP 1323 Options. You might want to use one of the recommended RWIN values below.

RWIN is a multiple of MSS
Other RWIN values that might work well with your current MTU/MSS:
63888 (up to 2 Mbit lines, depending on latency. MSS * 44)
127776 (1-5 Mbit lines, depending on latency. MSS * 44 * 2)
255552 (2-14 Mbit lines, depending on latency. MSS * 44 * 2^2)
511104 (8-30 Mbit lines, depending on latency. MSS * 44 * 2^3)
1022208 (25-60 Mbit lines depending on latency. MSS * 44 * 2^4)
bandwidth * delay product (Note this is not a speed test):

Your TCP Window limits you to: 2672 kbps (334 KBytes/s) @ 200ms
Your TCP Window limits you to: 1069 kbps (134 KBytes/s) @ 500ms
MTU Discovery (RFC1191) = ON
Time to live left = 46 hops
TTL value is ok.
Timestamps (RFC1323) = OFF
Selective Acknowledgements (RFC2018) = ON
IP type of service field (RFC1349) = 00000000 (0)

MTU的值是變了，但數值中有+底線的那行值要接近256960才算成功
我的怎麼設定都沒有變，一樣66792...
超低
該怎麼解救?
http://www.speedguide.net/analyzer.php?DATA_OFFSET=40&TCP_Options_string=020405ac0103030201010402&IP_MTU_DISCOVER=1&WIN=16698&RWIN=66792&MSS=1452&SCALE=2&TTL=46&TSOPT=0&SACK_PERM=1&IP_TOS=0&IP=118.166.122.143×tamp=1345777373
這網址是看值的網址