I'm no help with this one, but I did send you a PM about a problem you had yesterday - up the top there in the little grey envelope.

If someone doesn't come along soon with an answer, try giving PayPal a call.

My only thought is have you connected your eBay account to PayPal, and is the email address of your eBay account registered with PayPal. maybe it is , can't remember how it works or if it means it's connected cos you could pay as a buyer iykwim, but that's where I'd be starting.