[HELP]->Networking failed after formatted notebook.

[wackyflik]

i just formatted my notebook and i tried to create a network between my desktop and notebook. both desktop and notebook, have only 1 user and logging in as an administrator and also no password has been set at both desktop and notebook. i have disabled 'Use Simple File Sharing (Recommended)' at both desktop and notebook. my notebook can accesses my desktop but my desktop failed to access my notebook. how could i settle it?