[thredds] NcML aggregation error

Hi,
 
Dataset info:
 dimensions:
   time = UNLIMITED;   // (73 currently)
   s_rho = 32;
   eta_rho = 242;
   xi_u = 289;
   eta_v = 241;
   xi_rho = 290;
 variables:
   float u(time=73, s_rho=32, eta_rho=242, xi_u=289);
   float v(time=73, s_rho=32, eta_v=241, xi_rho=290);

Note: No coordinate variables are declared.
 
NcML aggregation:
<netcdf xmlns="http://www.unidata.ucar.edu/namespaces/netcdf/ncml-2.2";>
<variable name="aggtime">
<attribute name="units" value="hours since 2010-12-08T08:00:00Z"/>
<attribute name="_CoordinateAxisType" value="Time"/>
</variable>
<aggregation dimName="aggtime" type="joinExisting">
<netcdf location="C:/aroms/fsct_malaysia_2010122708_2010123008.nc"
coordValue="0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22
23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46
47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70
71 72"/>
</aggregation>
</netcdf>
 
threddsServlet.log:
2012-01-10T14:51:08.323 +0000 [     22812][      14] INFO  -
thredds.server.opendap.OpendapServlet - doGet(): Remote host: 127.0.0.1
- Request: "GET /thredds/dodsC/roms2/roms2.nc.html HTTP/1.1"
2012-01-10T14:51:08.340 +0000 [     22829][      14] INFO  -
thredds.server.opendap.OpendapServlet - Request Completed - 404 - -1 -
17
 
Can anyone explain why I get the HTTP 404 error.
 
Kind regards,
 
Glenn Comiskey
Data System Administrator