BB Curve :: Invalid Email Password In 8520?

I had a BB curve 8520 for past 2 years and loved it. Over Christmas, my son had my old BB and I bought a new one - exactly the same - the Curve 8520. Both operate on orange networks. My old BB was v4 new BB is v5.I have a personal email address, and 5 work email accounts - all of which have worked perfectly fine on the old BB. However when trying to add them to the new BB, although my personal account has been accepted, when trying to input my work email I keep getting a message that the password is not correct (which I know it is. I have even tried resetting my work email password on the email server).The email accounts were removed from the old BB when it was given to my son, and although they have worked on that BB for 2 years, I tried reloading them on his BB - but now have the same error message of incorrect password.I have surfed the net and can see this seems to be an issue, mostly for gmail accounts (My work email is not a gmail account) - but no specific response on how to resolve it. I have carried out all the checks such as making sure keyboard is set to right language, and font does not automatically set capitals as first letter, so that isnt the problem.The phone is primarily for business use - so I absolutely have to resolve this.