No Connection Could Be Made Because The Target Machine Actively Refused It

Hello,

 I am not sure if this is the right forum.

This is the first time that I have seen this error,
No connection could be made because the target machine actively refused it

I have a web app that when some one inserts text in a text box and clicks a button it creates a new web page and a new table in the database.  Up until this point it has always worked.  A datalist returns the data.  In the datalist there is a hyperlink that when clicked takes the client to the new webpage.  But for some reason it is not working now and that is the error above.

I am lost.  Any help appreciated.

Thanks Matt