VMware GRE Web Plugin not installing

Hi there,

Have deployed DP8, to backup a vSphere 5.1 environment.  Vmware Integrated backups work fine, but i'm trying to dpeloy the GRE Web Plugin to the vCenter server and its not happy:

2013-08-21 13:08:35 VMWGRE_WP.6188 ('/integ/perl/Omniback.pm 35830':1680) b
File not found - C:\Program Files\VMware\Infrastructure\tomcat\\webapps\VMWareGRE\register.xml

There is a problem with VMware VirtualCenter Management Webservices service. Check that the target system has VMware VirtualCenter Management Webservices running.

is the error im getting in the debug.log on the vcenter server... 

anyone had this issue with DP8 and vSphere 5.1?

Thanks in advance,

Jake.