Strange behavior of conditionally enabled Applet button

Hi,

We have a simple functionality to enable a button conditionally on an applet. The button should only be visible when user has performed a query on the applet. The way we have implemented it is we set a profile attribute as Y when user has performed a query and we check this profile attribute in PreCanInvoke event for the method invoke behind this button. Based on this we conditionally enabled this button.

We are facing two strange issues with this:

1. When user first navigates to this applet expected result is that this button should be disabled since user hasn't performed any query. But actually what we see is that button has completely disappeared from the applet and is only available when we perform the query