can not delete Custom Resources in Advanced Services

Hi, All,

I encounter a problem when I try to delect a custom resources in advanced services.

Initially,

1。 I created Custom Resources named: Create DC， type:VC:datacenter

2。 Created a service blueprints named create datacenter with workflow (external vCO 5.5) - create a datacenter,provisioned resource with the above custom resources and published it.

3。created a service at Administration named test, add published service blueprints as catalog items.

4, created entitlements, add service:test, catalog items:create datacenter

5, I used Catalog request to create a datacenter OK

Then， I try to clear all of the service and its custom resources

1. I removed provisioned resource in service blueprints for create datacenter

2. delete any relational items in Administrator: services, entitlements...

3 try to delete custom resources : Create DC ,

but recevice an error :Service not found. If the problem persists, contact your system administrator.

Is there anyone can help me? tks