Text-Widget: HTML-Code breaks

Hi,

when I try to insert the following code, it is automatically replaced when saving the widget:

<h2>Demonstration Freiheit statt Angst 2009 am 12.09.09 in Berlin!</h2>

<img src="http://de.freedomnotfear2009.org/wp-content/upload_de/fnf09-logo_1.png" width="300px" border="0" /><br />
<div style="font-size:x-small">(The Image and Logo has been originally created by <a href="http://www.humanrights21.org//FNF-gfx/index.html">Pascale Riby</a> and is licensed under <a href="http://creativecommons.org/licenses/by/2.0/fr/">Creative Commons-BY 2.0</a>.)</div>
<hr />
<div><strong>Beginn:</strong><br />13:00 Uhr<br /><strong>Treffpunkt:</strong><br />Rotes Rathaus/Am Neptunbrunnen<br /></div>
<div><strong>Nächstes Bündnistreffen:</strong><br />Mittwoch, 29.07.2009 von 19:00 – 21:00 Uhr<br />im Büro der Jugendpresse Deutschland e.V.<br /><a href="http://maps.google.de/maps?q=Wöhlertstrasse+18+10115+Berlin">Wöhlertstraße 18, 10115 Berlin</a></div>

It is replaced by:

<h2>Demonstration Freiheit statt Angst 2009 am 12.09.09 in Berlin!</h2>

<img src=\"http://de.freedomnotfear2009.org/wp-content/upload_de/fnf09-logo_1.png\" width=\"300px\" border=\"0\" /><br />
<div style=\"font-size:x-small\">(The Image and Logo has been originally created by <a href=\"http://www.humanrights21.org//FNF-gfx/index.html\">Pascale Riby</a> and is licensed under <a href=\"http://creativecommons.org/licenses/by/2.0/fr/\">Creative Commons-BY 2.0</a>.)</div>
<hr />
<div><strong>Beginn:</strong><br />13:00 Uhr<br /><strong>Treffpunkt:</strong><br />Rotes Rathaus/Am Neptunbrunnen<br /></div>
<div><strong>Nächstes Bündnistreffen:</strong><br />Mittwoch, 29.07.2009 von 19:00 – 21:00 Uhr<br />im Büro der Jugendpresse Deutschland e.V.<br /><a href=\"http://maps.google.de/maps?q=Wöhlertstrasse+18+10115+Berlin\">Wöhlertstraße 18, 10115 Berlin</a></div>

As you can See, the ” within HTML-tags are replaced by \”

Why does that happen???

Best regards,
Ricardo Cristof