Not recieving emails but sending AOL account

in one of my Emclient email accounts it wont recieve emails from AOL i can send but won’t recieve if igo into that email account settings & on general the smtp & imap boxes are greyed out i have another emaill on same machine all works fine
this faulty email address is working fine on other machines
Tried so far disabled firewall no go check all setting they are correct
if i go direct to AOL site send & recieve emails no problem
looking for help i am at my witts end
thanks Des