Hi,
Does running the Error Check on the page (bottom) provide any tips on the problem?
Danno
Edit: I see your trying to list to eBay.ca (selected at page top) from other posts this week. I assume you're also resident in Canada. Is this your 1st attempt to list? I believe the code needs to be 6 digits, no space. Selecting the city-region without the code should also work.
Edit2: Correction...My check of the code shows that a space between the first 3 and last 3 digits is correct format for the Canada Postal Code field and passes the Error Check.