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Use of http proxy?

IDV seems to be having trouble with our http proxy (squid). I've set the following global parameters in runIDV.bat in the usual way; 

-Dhttp.proxyHost=proxyhost -Dhttp.proxyPort=3128
however IDV fails to retrieve any data in the Data Chooser. See traceback below. Could it have something to do with IDV insisting DODS URI's begin with dods:// perhaps? What is the recommended solution for using a http proxy?
By the way, I can navigate the server in the "Display" / web browsing tab. It's only the Data Chooser that fails. 

Thanks, Nick

An error has occurred:
There was an error loading the data:
Error creating data source:dods.grid with: http://www.marine.csiro.au/dods/nph-dods/dods-data/bl/SPINUP4/temp/ Grid data source failed making data set: dods://www.marine.csiro.au/dods/nph-dods/dods-data/bl/SPINUP4/temp/ Cant open dods://www.marine.csiro.au/dods/nph-dods/dods-data/bl/SPINUP4/temp/ or as DODS dods://www.marine.csiro.au/dods/nph-dods/dods-data/bl/SPINUP4/temp/ 
www.marine.csiro.au
java.io.FileNotFoundException: Cant open dods://www.marine.csiro.au/dods/nph-dods/dods-data/bl/SPINUP4/temp/ or as DODS dods://www.marine.csiro.au/dods/nph-dods/dods-data/bl/SPINUP4/temp/ 
www.marine.csiro.au
   at ucar.nc2.dataset.NetcdfDataset.openDODS(NetcdfDataset.java:380)
   at ucar.nc2.dataset.NetcdfDataset.openFile(NetcdfDataset.java:316)
   at ucar.nc2.dataset.NetcdfDataset.openDataset(NetcdfDataset.java:175)
at ucar.nc2.dataset.NetcdfDatasetCache.acquire(NetcdfDatasetCache.java:203) at ucar.nc2.dataset.NetcdfDatasetCache.acquire(NetcdfDatasetCache.java:183) at ucar.nc2.dataset.NetcdfDatasetCache.acquire(NetcdfDatasetCache.java:171) 
   at ucar.nc2.dt.grid.GridDataset.open(GridDataset.java:71)
at ucar.unidata.data.grid.GeoGridDataSource.doMakeDataSet(GeoGridDataSource.java:726) at ucar.unidata.data.grid.GeoGridDataSource.getDataset(GeoGridDataSource.java:743) at ucar.unidata.data.grid.GeoGridDataSource.initAfterCreation(GeoGridDataSource.java:335) 
   at ucar.unidata.data.DataManager.createDataSource(DataManager.java:1186)
at ucar.unidata.idv.IntegratedDataViewer.createDataSource(IntegratedDataViewer.java:1698) at ucar.unidata.idv.IntegratedDataViewer.makeDataSource(IntegratedDataViewer.java:1617) at ucar.unidata.idv.IntegratedDataViewer.makeDataSource(IntegratedDataViewer.java:1595) at ucar.unidata.idv.IntegratedDataViewer.handleAction(IntegratedDataViewer.java:1446) 
   at ucar.unidata.idv.DefaultIdv.handleAction(DefaultIdv.java:112)
at ucar.unidata.idv.IntegratedDataViewer.handleAction(IntegratedDataViewer.java:1378) 
   at ucar.unidata.idv.chooser.UrlChooser.loadURLInner(UrlChooser.java:250)
   at ucar.unidata.idv.chooser.UrlChooser.loadURL(UrlChooser.java:222)
at ucar.unidata.idv.chooser.UrlChooser.doLoadInThread(UrlChooser.java:269) 
   at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 
   at java.lang.reflect.Method.invoke(Method.java:585)
   at ucar.unidata.util.Misc$2.run(Misc.java:919)
   at ucar.unidata.util.Misc$3.run(Misc.java:947)


And another example from your own servers...
java.io.FileNotFoundException: Cant open dods://motherlode.ucar.edu:8080/thredds/dodsC/modelsNc/NCEP/NAM/CONUS_80km/NAM_CONUS_80km_20070524_1200.nc or as DODS dods://motherlode.ucar.edu:8080/thredds/dodsC/modelsNc/NCEP/NAM/CONUS_80km/NAM_CONUS_80km_20070524_1200.nc 
motherlode.ucar.edu
   at ucar.nc2.dataset.NetcdfDataset.openDODS(NetcdfDataset.java:380)
   at ucar.nc2.dataset.NetcdfDataset.openFile(NetcdfDataset.java:316)
   at ucar.nc2.dataset.NetcdfDataset.openDataset(NetcdfDataset.java:175)
at ucar.nc2.dataset.NetcdfDatasetCache.acquire(NetcdfDatasetCache.java:203) at ucar.nc2.dataset.NetcdfDatasetCache.acquire(NetcdfDatasetCache.java:183) at ucar.nc2.dataset.NetcdfDatasetCache.acquire(NetcdfDatasetCache.java:171) 
   at ucar.nc2.dt.grid.GridDataset.open(GridDataset.java:71)
at ucar.unidata.data.grid.GeoGridDataSource.doMakeDataSet(GeoGridDataSource.java:726) at ucar.unidata.data.grid.GeoGridDataSource.getDataset(GeoGridDataSource.java:743) at ucar.unidata.data.grid.GeoGridDataSource.initAfterCreation(GeoGridDataSource.java:335) 
   at ucar.unidata.data.DataManager.createDataSource(DataManager.java:1186)
at ucar.unidata.idv.IntegratedDataViewer.createDataSource(IntegratedDataViewer.java:1698) at ucar.unidata.idv.IntegratedDataViewer.makeDataSource(IntegratedDataViewer.java:1617) at ucar.unidata.idv.IntegratedDataViewer.makeDataSource(IntegratedDataViewer.java:1595) at ucar.unidata.idv.IntegratedDataViewer.makeDataSource(IntegratedDataViewer.java:1576) at ucar.unidata.idv.chooser.IdvChooser.makeDataSource(IdvChooser.java:610) at ucar.unidata.idv.chooser.ThreddsHandler.processNodes(ThreddsHandler.java:842) at ucar.unidata.idv.chooser.ThreddsHandler.processNode(ThreddsHandler.java:782) 
   at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 
   at java.lang.reflect.Method.invoke(Method.java:585)
   at ucar.unidata.util.Misc$2.run(Misc.java:921)
   at ucar.unidata.util.Misc$3.run(Misc.java:947)
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