Windows Live mail not sending/receiving emails

Hi all, I have been having a problem setting up a friends business email account in windows live mail. He has two machines; W7 HP 64 bit and a new W8 desktop. The email account has been added to both machines but I keep getting an error telling me that the password is wrong even thought it is correct. Even more baffling is the fact that he can send/receive emails to and from his phone without issue for the same email account. I have duplicated the settings on both the phone and pcs with regards to port numbers etc but cannot get round it in any way. His broadband provider is Tiscali an they have been having server issues as he is unable to access his tiscali emails. The email account in question is not his tiscali account though. Could the Tiscali issue be at the root of this? Any help would be appreciated.