Paypal payment processing problem

I am currently using 1.4.4 (http://www.gatasata.com)and when a buyer selects paypal as the payment method they get the following error message:

Return to Merchant

This recipient either does not accept payments denominated in CKZ or has specified an invalid currency code on his web site. Please contact the seller and ask him either to update his payment receiving preferences to accept this currency or to correct his web site to specify a valid currency code.

The currency code on the site is correct and paypal has been set up to accept Czech Crowns, but I can't seem to understand why I am getting this error message or how to fix it.

Paypal has been no help. Can someone help? A bit desperate.

It should be CZK, not CKZ.

https://cms.paypal.com/us/cgi-bin/?cmd= ... ency_codes

Thanks Justinv! Such as simple problem. Now that just caused a lot of lines of error messages on the home page. I'll see if I can correct that myself.

Ok. can't figure out how to delete the CKZ fom th Home Library or to modify it so it eliminates the error notice that is on the site.