Cannot Get Mail-Hotmail iPhone

Hi guys, I recently changed my Hotmail account password and since then have been unable to access the account on my iPhone 3GS, even though I have updated it to the new password on there too.
I keep getting a message which says Cannot get Mail - The username or password for Hotmail is incorrect- I have tried the new password and even the old one as I had never had a problem with retrieving messages before. Ive also tried deleting the account from my phone and setting it up again as a new one but nothing seems to work.
Please help - Im going abroad in a couple of days and need to access my emails!
Medion Windows Vista