Session lost after using Show Table Data query in VWD 2008 Express

First, I'm running my application on my local Win 7 box, and viewing the site on the same box.
 
I have several session variables set while interacting with my application. When I go to check the data in the database through the Database Explorer (Show Table Data), my session is lost. This is instant.
 
Why does this happen? Is there a way to prevent it?
 
Thanks!
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