asp:Label value not outputting

Question

Hi, I have an issue where I am using Page_Load to write a value to a label on the aspx page and it appears that the first time I do it the value (in this case a url param value) is displaying correctly. After the first time, the page does not break, but the Label does not get populated wth the value any more. Any help on this would be hugely appreciated. Thank you, Kyle