webflow on WAS

I hope this is the correct place...

I am activating WAS for html and it seems to be running ok.

Ping works etc,

But althought he demo webflow is activated, when run I get the following error

500 Internal Server Error

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Internal Server Error(9)

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Error: 9

Version: 6020

Component: HTTP_PLG

Module: htst_plg.c

Line: 2917

Server: voyager_OCI_00

Detail: Error in HTTP Request

Here is the line I am entering

http://:8000/sap/bc/webflow/demo/trareq_update

Any help would be appreciated.

Thanks