Global cart save option does not save PayPal API

Hi there –

Now that I have Multisite and marketpress installed, I am trying to configure settings and chose Global cart, since I will NOT be taking individual payments from shops on transactions (it will be a flat rate subscription model)

So I go to MarketPress Network Options, and choose PayPal Express Checkout and put in the PayPal API Signature settings and a header image stored on a secured server.

I press Save Options, and the page appears to save but all the content disappears?

How do I fix this?

Thanks, Kelly