is ur ftp dolder is on the same pc or someother shared folder..
if it is the same pc do this..
put tick mark on check box @ allow anonymouss @ parent FTp sites
and untick the check box @ allow anonymus @ default ftp site
so that u can access the ftp site after restarting the service with help of any local user account ..
if it is @ share folder check whether u have given correct Userbane and passswod on the 'Connect' option @ ftp folder path's tab