security exception in windows 7

Question

Hi,

I have a website which is uploaded on to daily.co.uk. It is working fine but when i am sending mail via SMTP so it is not going. I found from net that daily.co.uk support CDO smtp so i coded for this, But it gives security exception so i wrote <trust level="Full" /> in my web.config file. The web is working fine in XP but on working in windows 7 it gives Exception in web.config file that it is not support. So please help me out. what kind of setting i have to do in web.config so my web work fine in all windows and server also.

Thanks in advance.