Error accessing a web service hosted behind a web dispatcher

[Sigurdur]

I have a ABAP web service running on NW 7.0 SP1

If i access the service directly on the app server - everything works fine

http://appsrv1.domain.com/sap/bc/srt/rfc/sap/zphreg/020/zphreg/zphreg/

But if I go through a Sap Web Dispatcher, which is configured as a load balancer

http://sapgw.domain.com:81/sap/bc/srt/rfc/sap/zphreg/020/zphreg/zphreg/

I get the following Error

StatusCode: 500, Internal server error

Reason: SRT: Unexpected failure in SOAP processing occurred: ("No configuration for this HTTP server instance")

I have the following parameters in the dispatcher profile

wdisp/add_clientprotocol_header = true

wdisp/add_xforwardedfor_header = 1

wdisp/handle_webdisp_ap_header = 1

Is there some way to configure alternate hosts in the SOAMANAGER, or has the service to be created with the dispatcher configured as an endpoint somehow

[Sigurdur]

SOLVED

The problem was with the URL ending on a slash character /