Mail.com Log In Problems

I originally posted the following in my intro in the welcome centre and was directed to post it here:

Ok, I'm not sure if I'm in the right part of the forum, as I wanted to say, and introduce myself as well as talk about my problem.

I'm Kimberley from South Eastern Ontario. Housewife and mother to 3 grown kids my expertise lies far outside the computer realm. I'm hoping to get a little more insight into how things work on the computer so that I'll be able to troubleshoot problems more efficiently.

I tried to look around the forum to see if there was a category for my problem but I didn't see one. I got a mail.com account because my Daughter and I are starting an online business, and we didn't want to use yahoo or gmail because mail.com allows you to pick a customised domain name. We thought yahoo, hotmail and gmail would look less proffessional. What's happening is this: I've been trying to log into the account and I keep getting the error message that I can't connect to the server. I had been logged in but my session timed out and since then I couldn't log back in. My daughter says she can log in fine on her computer.

My browser is firefox 3 but I tried it with IE 8 as well and neither of those are working. The funny thing is Netscape allows me to log in just fine. I don't want to switch browsers so I'm hoping someone will be able to help me fix firefox. I am not technically inclined by any means, so whatever help is offered will have to be uncomplicated as I probably won't be able to follow it otherwise.

Thank you very much.