Hello.Please provide a link to your product page.

"there was a problem bla bla." - Please clarify what exactly is written on the error page. Maybe you can send a screenshot.

Perhaps this and this will be useful to you.

"Why is this happening?" - Perhaps you have configured something wrong, perhaps an error in the program, perhaps something on the side of the payment system. To find out, please provide more information about the situation.

I sent a notification about your question to the company employees, expect an answer from them here in the comments.

Hi. The website is http://appliancesparesrus.com If you type this into the search WMB71021w and go through the process. When you click the paypal pay now button at the end of the process, A message comes up, see attached secreen grab. Thanks.  

Terry, I have just tried to put an order through.. (Andy Aird)  and got the same error. # not working.  When setting up your site//process  did you successfully link Paypal to your Web X5?   Please ensure  that web address in upload page, is https:// as well.  i was getting an error because of this way back when it changed,  and it does make the difference between working and not.  Perhaps  remove the "right click" protection so more clever people than me may look at source code  on pages...

Thanks all for the support. I have managed to set it up.

I forgot to link pp to my bank account, it is now working, Thanks again.

The only problem I have now, is that pp does not give an option to check out as a guest.