DateTime.Now Not Printing to Label, SOS!

I don't understand what the issue is, but when ever I run this:

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DateTime dt = DateTime.Now;
lblTime.Text += Convert.ToString(dt);


lblTime.Text shows nothing!

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When I run it on LocalHost, it works as you would expect.

Am I missing something??

 

PS. This is ASP.Net 4.0 in c#

 

Where are you putting this? In your Page load?