Are you using mail2Web ? (I had never heard of it before but did search)
http://mail2web.com/
What email system are you trying to get to - gmail, hotmail (outlook) or one from your ISP or your work?
What actually happens on the mail2web page when you try to use it?
p.s. If you are on a web based email system like gmail or hotmail/outlook then you should be able to logon from any browser.
This is why for many people it is "best" to have a web based email system like gmail or hotmail/outlook as you can logon and use it anywhere in the world on any browser, no complex setup.
And if you have a Android phone that is linked to your gmail email address (as mine is) all your emails are delivered to your phone wherever you are in the world.
I guess the same applies to Apple phones or Windows phones.
Give us more info and we will try to help.