a little help required with the vcenter plugin for emc

I have installed the  solutions enabler and the virtual storage intergrator and deployed the se712 vapp, configured the vapp with an ip adress. I then configured the emc plugin with the vapp ip abnd credentials, tested the connection fine and discovered the clariion array - no problems so far :-)

Now whilst I can view emc related storage information when i try to provision new storage from vcenter I get the following error:- any ideas?