Are you talking about the Paypal addy that is on the Lister window in AW2K? You can change the email address on the Lister window after uploading images but prior to actually using "List all Lots".
You should take a look at your account email address at eBay and be sure the email address is correct there as well.
I am glad the insertion fee sale is working well for you..
Re: Why open an Ebay store?