Referencing a site in Timer Job

Hello,
I am a bit confused with SharePoint URLs. I enter the site by address http://abcuniversity/ in Internet Explorer. I need to read the lists from that site in a Timer Job. I use the following code:               
        public override void Execute(Guid targetInstanceId)
        {
            using (SPSite site = new SPSite("http://abcuniversity/"))
            {
               using (SPWeb web = site.OpenWeb())
                { ...
However the site is null when debugging. What is wrong in that code?
Thanks,
Radek