milica, when you are dialing, what are the exact symptoms? Do you get a good connection to the ISP?
Please post this when connected.
Hold the Windows key and press R, then type CMD to open a command prompt:
In the command prompt window that opens, type type the following command:
Note that there is a space before the /ALL, but there is NOT a space after the / in the following command.
Right click in the command window and choose Select All, then hit Enter to copy the contents to the clipboard.
Paste the results in a message here.
If you are on a machine with no network connection, use a floppy, USB disk, or a CD-RW disk to transfer a text file with the information to allow pasting it here.