Problems with mime type in WMS capabilities request

[Nuno GIL]

Dear Listers,
When I request a getcapabilites from our server
(http://iceds.ge.ucl.ac.uk/cgi-bin/wms?map=wms.map&SERVICE=WMS&VERSION=1.1.1&REQUEST=GetCapabilities),
the capabilities file type that is returned is not recognized as XML
and not displayed immediately on the browser... To go around this I
simply rename the file adding an XML extension to it. This may have to
do with a wrong mimetype configuration...
Any ideas how to sort this out?
Regards,
Nuno