"submit query" instead of control

[MadSeb]

Hello,

I'm using Visual Studio 2008.

I have a Web User Control which contains some NI controls.

I have a Web Form page which contains my control.

When I run the page.. everything works well (see my first attached image)..but  at certain times ..I get a "submit query" text instead of the control ( see my second attached image) ....

Is this a known bug ?

Best regards,
MadSeb

[MadSeb]

Additional info:

1. This only seems to happen in Firefox ( in Internet Explorer everything seems to work fine )

2. The bug seems to happen when I click on one of the buttons.