Why do I get this error message when trying to access WFS?

[Brown, Jeff (C2MS)]

I get the following error message when I try to access my WFS resource:
msOGRFileOpen(): OGR error. Open failed for OGR connection
`/ms4w/tmp/ms_tmp/\7bb0d77657833c3f75a5de7149b5572f.tmp.gml'. File not
found or unsupported format. 
The file is present in the \msw4\tmp\ms_tmp directory and can be read
with the following command: 
C:\Program Files\FWTools1.0.0b2>ogrinfo
C:\ms4w\tmp\ms_tmp\7bb0d77657833c3f75a5de7149b5572f.tmp.gml 
Here are the results: 
Had to open data source read-only.
INFO: Open of
`C:\ms4w\tmp\ms_tmp\7bb0d77657833c3f75a5de7149b5572f.tmp.gml' using
driver `GML' successful.
1: envdat:envirodat 
Thanks! 
JAB

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