Margit- the problem is that DotNetNuke already uses a 'form' which is a way for the current page to post back information to the server. All DotNetNuke pages are forms-based, so that all the links like login, search, etc can work by sending the response back to the DotNetNuke website.

The PayPal buttons need to be on a form as well - if you look at the sample html you'll see the form tags. This is because the PayPal buttons post the information back to the PayPal server, and, as DNN already is setup to post back to your own server, it doesn't work (as you've found out).

Basically, at this point, your choices are this:
1) set up a html page with the paypal code, and locate it in an iframe on your DNN page somewhere.
2) purchase a paypal buttons module - there are some on snowcovered.
3) get a developer to write you a custom dnn module for your needs.

I can heartily recommend option 2 - the modules aren't very expensive and will save you far more time than they cost to implement.

Thanks Bruce - the iframes look interesting for other purposes too! I've had a look on Snowcovered and this seems like a simple option too. Will explore this a bit more.

Marcel, thankyou as well. I have tried this option but cannot seem to make it work. Probably something to do with having absolutely no idea about programming and knowing where instructions should be written in the code.

I've managed a temporary fix for the site, but will keep exploring. For now I've loaded the Buy button gif and simply linked it to the email link code Paypal have given me. A bit basic, but it's a good stopgap...unless you know of potential pitfalls with this :)

Honestly...thankyou so much!!!