Column Filter - External Form don't work with IE7

Hi folks,

the Problem is that the ColumnFilter seems to not work with the sSelector in IE7.

The Datatables is running in Intranet, so just Screenshots:
In FF it is shown correctly: http://download.eyecook.net/ff19.jpg
In IE7 it looks like that: http://download.eyecook.net/ie7.jpg

The Code in Init:

'...
}).columnFilter({
			
			aoColumns: [ 
					 null,
				     { sSelector: "#filterort", type: "select", values: ['.$this->getort($usermnr).'] },
					 { sSelector: "#filterabt", type: "select", values: ['.$this->getabteilung($usermnr).']  },
					 { sSelector: "#filtergebz", type: "select", values: ['.$this->getgebz($usermnr).'] },
					 { sSelector: "#filtertyp", type: "select", values: ['.$this->getgtyp($usermnr).'] },
					 null,
					 { sSelector: "#filterherst", type: "select", values: ['.$this->getgherst($usermnr).'] },
					 { sSelector: "#filtereinw", type: "select", values: ['.$this->geteinwpfl($usermnr).']}
					 
			]
			});
...
'

My Filter Table:

		<table class="filter" >
		  <thead>
			  <tr>
				<th colspan="11">Filter</th>
			  </tr>	
		  </thead>
		  <tbody>
			  <tr class="odd">
				<td>Standort:</td>
				<td class="fbox" id="filterort" colspan="1"></td>
				<td>&nbsp;</td>
				<td>Abteilung:</td>
				<td class="fbox" id="filterabt" colspan="1"></td>
				<td>&nbsp;</td>
				<td>Ger&auml;teart:</td>
				<td class="fbox" id="filtergebz" colspan="1"></td>
				<td>&nbsp;</td>
				<td>Hersteller</td>
				<td class="fbox" id="filterherst" colspan="1"></td>
			  </tr>	
			  <tr class="odd">
				<td>Typ:</td>
				<td class="fbox" id="filtertyp" colspan="1"></td>
				<td>&nbsp;</td>
				<td>Einweisungspfl.:</td>
				<td class="fbox" id="filtereinw" colspan="1"></td>
				<td>&nbsp;</td>
				<td></td>
				<td class="fbox" colspan="1"></td>
				<td></td>
				<td></td>
				<td class="fbox" colspan="1"></td>
			  </tr>
		  </tbody>
		</table>

Is there any solution for this??