WCS error - msDrawRasterLayerLow

[Nuno Gil]

Dear Listers,
I am trying to request a WCS coverage:
http://iceds.ge.ucl.ac.uk/cgi-bin/wcs?map=wcs.map&SERVICE=WCS&REQUEST=GetCoverage&COVERAGE=landsat_europe&CRS=EPSG:4326&BBOX=-6,40,-5.5,40.5&RESX=0.00027778&RESY=0.00027778&FORMAT=geotiff

The browser displays:
"The server encountered an internal error or misconfiguration and was
unable to complete your request."

And the Apache error.log file has the following information on it:
[Thu Apr 21 16:49:02 2005] [error] [client 128.40.25.202] Premature
end of script headers: wcs
[Thu Apr 21 16:49:02 2005] [error] [client 128.40.25.202] [Thu Apr 21
16:49:02 2005].887169 msDrawRasterLayerLow(landsat_europe): entering.

Any hints?
Regards,
Nuno