NW6 sp3, BM3.7 sp3 fp4a

When trying to access http://parkscanada.pch.gc.ca/ I get a
502 error telling me of a mal formed reply from origin web

The site works from outside the BM box but not behind it.

Transparent proxy is turned off.

Tim R Hautzinger
Information Systems Manager
Elk Island Catholic School District
160 Festival Way
Sherwood Park, Alberta