i found some stuff in Access.log...
<2008-11-28T11:00:20> Administrator CreateSession.1.0.0:0() Success
<2008-11-28T11:00:25> Administrator GetResourceContent.1.0.0:2(Library://Layouts/Flexible.ApplicationDefinition,) Success
<2008-11-28T11:00:25> Administrator GetResourceContent.1.0.0:2(Library://Layouts/Flexible.ApplicationDefinition,) Success
<2008-11-28T11:00:25> Administrator GetResourceContent.1.0.0:2(Library://Layouts/Flexible.ApplicationDefinition,) Success
<2008-11-28T11:00:25> Administrator GetResourceContent.1.0.0:2(Library://Topobase Web Layout/Map.MapDefinition,) Success
<2008-11-28T11:00:25> Administrator GetResourceContent.1.0.0:2(Library://Layouts/Flexible.ApplicationDefinition,) Success
<2008-11-28T11:00:26> Fusion Viewer 192.168.74.100 Administrator GetResourceContent.1.0.0:2(Library://Layouts/Flexible.ApplicationDefinition,) Success
<2008-11-28T11:00:28> Fusion Viewer 192.168.74.100 Administrator GetResourceContent.1.0.0:2(Library://Topobase Web Layout/Map.MapDefinition,) Success
<2008-11-28T11:00:28> Fusion Viewer 192.168.74.100 Administrator SetResource.1.0.0:3(Session:949836e8-ffff-ffff-8000-0050568d721b_en_7F0000010AF20AF10AF0//Map4930159c02831.Selection,MgByteReader,MgByteReader) Success
<2008-11-28T11:00:28> Fusion Viewer 192.168.74.100 Administrator SetResourceData.1.0.0:4(Session:949836e8-ffff-ffff-8000-0050568d721b_en_7F0000010AF20AF10AF0//Map4930159c02831.Selection,RuntimeData,Stream,MgByteReader) Success
<2008-11-28T11:00:28> Fusion Viewer 192.168.74.100 Administrator SetResource.1.0.0:3(Session:949836e8-ffff-ffff-8000-0050568d721b_en_7F0000010AF20AF10AF0//Map4930159c02831.Map,MgByteReader,MgByteReader) Success
<2008-11-28T11:00:28> Fusion Viewer 192.168.74.100 Administrator SetResourceData.1.0.0:4(Session:949836e8-ffff-ffff-8000-0050568d721b_en_7F0000010AF20AF10AF0//Map4930159c02831.Map,RuntimeData,Stream,MgByteReader) Success
<2008-11-28T11:00:28> Fusion Viewer 192.168.74.100 Administrator SetResourceData.1.0.0:4(Session:949836e8-ffff-ffff-8000-0050568d721b_en_7F0000010AF20AF10AF0//Map4930159c02831.Map,LayerGroupData,Stream,MgByteReader) Success
<2008-11-28T11:00:29> Fusion Viewer 192.168.74.100 Administrator GetResourceContent.1.0.0:2(Library://Topobase Web Layout/Map.MapDefinition,) Success
<2008-11-28T11:00:29> Fusion Viewer 192.168.74.100 Administrator SetResource.1.0.0:3(Session:949836e8-ffff-ffff-8000-0050568d721b_en_7F0000010AF20AF10AF0//Map4930159d11c63.Selection,MgByteReader,MgByteReader) Success
<2008-11-28T11:00:29> Fusion Viewer 192.168.74.100 Administrator SetResourceData.1.0.0:4(Session:949836e8-ffff-ffff-8000-0050568d721b_en_7F0000010AF20AF10AF0//Map4930159d11c63.Selection,RuntimeData,Stream,MgByteReader) Success
<2008-11-28T11:00:29> Fusion Viewer 192.168.74.100 Administrator SetResource.1.0.0:3(Session:949836e8-ffff-ffff-8000-0050568d721b_en_7F0000010AF20AF10AF0//Map4930159d11c63.Map,MgByteReader,MgByteReader) Success
<2008-11-28T11:00:29> Fusion Viewer 192.168.74.100 Administrator SetResourceData.1.0.0:4(Session:949836e8-ffff-ffff-8000-0050568d721b_en_7F0000010AF20AF10AF0//Map4930159d11c63.Map,RuntimeData,Stream,MgByteReader) Success
<2008-11-28T11:00:29> Fusion Viewer 192.168.74.100 Administrator SetResourceData.1.0.0:4(Session:949836e8-ffff-ffff-8000-0050568d721b_en_7F0000010AF20AF10AF0//Map4930159d11c63.Map,LayerGroupData,Stream,MgByteReader) Success
<2008-11-28T11:02:22> Administrator GetResourceData.1.0.0:3(Session:949836e8-ffff-ffff-8000-0050568d721b_en_7F0000010AF20AF10AF0//Map.Map,RuntimeData,) Failure
There is a failure on the last line.
Hope that helps.