[8.171][QUESTION][ANSWERED] astaro as parent proxy not allowing http file downloads

using another astaro as parent proxy lets you surf the web, but downloading files from websites doesn't work and the downloader app gives a blank page.  logfile gives error 404 file not found

2011:06:23-12:54:07 vpn httpproxy[8775]: id="0001" severity="info" sys="SecureWeb" sub="http" name="http access" action="pass" method="GET" srcip="192.168.18.249" dstip="192.168.0.4" user="" statuscode="302" cached="0" profile="REF_DefaultHTTPProfile (Default Proxy)" filteraction="REF_DefaultHTTPCFFAction (Default content filter action)" size="0" request="0xda6a0360" url="www.mydefrag.com/.../Download.php
2011:06:23-12:54:07 vpn httpproxy[8775]: id="0002" severity="info" sys="SecureWeb" sub="http" name="web request blocked" action="block" method="POST" srcip="192.168.18.249" dstip="" user="" statuscode="404" cached="0" profile="REF_DefaultHTTPProfile (Default Proxy)" filteraction=" ()" size="4712" request="0xda759f10" url="passthrough.fw-notify.net/.../893420" exceptions="" error="download not found"
2011:06:23-12:54:08 vpn httpproxy[8775]: id="0002" severity="info" sys="SecureWeb" sub="http" name="web request blocked" action="block" method="POST" srcip="192.168.18.249" dstip="" user="" statuscode="404" cached="0" profile="REF_DefaultHTTPProfile (Default Proxy)" filteraction=" ()" size="4712" request="0xda759f10" url="passthrough.fw-notify.net/.../601704" exceptions="" error="download not found"
2011:06:23-12:54:08 vpn httpproxy[8775]: id="0002" severity="info" sys="SecureWeb" sub="http" name="web request blocked" action="block" method="POST" srcip="192.168.18.249" dstip="" user="" statuscode="404" cached="0" profile="REF_DefaultHTTPProfile (Default Proxy)" filteraction=" ()" size="4712" request="0xda759f10" url="passthrough.fw-notify.net/.../893420" exceptions="" error="download not found"