iProcurement : Cannot create Internal Requisition

I have setup iProcurement correctly & can create Requisitions for any inventory items.

Having issue with Internal Reqs only. I cant create them. When i click on Click here to select a source., i see only Master Org. The item is assigned to all the Inv Orgs and I have no issues in creating & processing a Internal Requisition using the standard Requisition form from any Purchasing responsibility.

I have poured thru' all the notes suggested here but cant still create Internal Reqs thru' iProcurement.

Any pointers here for resolution ?

Thanks in advance.