Windows 7 - Ad Hoc Connection Problem

Hello, I've just registered to that forum because i read a lot of solutions about Windows 7 on that forum, and it realy helped. So now i couldn't find any topic related to my problem, thats why i registered. So now about my problem:

I'm creating wireless ad hoc connection using my wifi usb adapter that is connected to my PC. After i can easily connect my laptop to internet without any wifi switches and routers or whatever. That was b4 my last Windows 7. today i reinstalled it, same Windows 7 build 7600 but there is a problem.

I do everything as i did before.
Simply clicking "Manage Wireless Networks" in Sharing Center, than "Add" and than filling the tab. I also tick "Save this Network". The connection works perfectly but...
http://img840.imageshack.us/img840/2666/capturerxf.png

...but when reboot my pc the created connection simply disapears.
http://img710.imageshack.us/img710/513/23182822.png

I tryed a lot but in vain, so my last hope is on this forum.
Also what i found out, when i click log out, the connection still apears, without any problem, as it was b4 my current new windows. Also on the blink of booting desktop i see deleted autorun program of Realtek Wifi Driver that was came from instalation disc. I wasnt using that program on my prev windows so i dont think that this is the root of all problems.

Sorry for my bad english.

(hours ago i posted same topic on another board and just now i found out that there is subboard about networks. i appologise)