Not allowing me to ship my item via UPS Ground even though that offered in the listing.

[deepbluewaters]

I want to ship my item UPS not USPS.  When creating the listing I chose UPS.  Then seller then selected UPS ground which is fine.  Now while trying to create the label the ebay system grayed out UPS service and only shows USPS service as selectable. What do I do to ship via UPS?