Error 651 in Windows 7

yesterday night, when I wanna connected to internet, as usually,,there was an error on it. There was a message that written,

"Error 651: The Modem (or other connecting device) has reported an error"

I'll try to disconnect and connect it again more than 5 times, and it made me so frustrated ! first I thought maybe there was some error in ISP (I'm using telkom speedy), so I wait it until today, hope it got normally like before.

today, I try connect to internet again, but, yeah..like last night, there's a same problem ! Error 651 again ! I ask my friend that using some ISP too like me, but she said there's no error ! she is browsing facebook when I call her. I think it's not the ISP error, but maybe my driver. So, I try to connect using my sister's notebook, and TARAA! it works just fine! My sister's using windows xp and mine, using windows 7 ultimate. So, I search on google to fix my problem.

Some said, to rename the raspppoe.sys like this message

"I would suggest you to replace the driver raspppoe.sys in Windows/System32/Drivers directory with a new one.
Here’s how you do it.
1. Rename the raspppoe.sys to raspppoe.old or any other name as per your choice.
2. Download the file from http://shell.windows.com/fileassoc/0409/xml/redir.asp?EXT=zip and save it in Windows/System32/Drivers directory.
Hopefully this should work."

so, I try to do like his suggestion, but it didn't work, my notebook could not rename it system. So, I try another way that simple but not using any command system or rename. I try to uninstall the modem and delete the connection, then I re-install both of them. After that I restart my note book and try to connect with full of hopes and prays. hahaha..

And it works! :D I get my connection back, so I can write this post! ^__^