Affiliate plugin not working with Membership plugin

I have updated to the latest version and the affiliate payment options do not appear for membership levels

current set-up: WP 3.0.4, BP 1.2.7, multisite

Both the latest Membership (1.0.5) and Affiliate (2) plugins installed. Payment gateways active (free and paypal) membership level added.

I have tried various places for the affiliate/membership.php plugin - standard plugins folder, mu-plugins folder but all to no avail.

I have no other known issues on this site as far as I am aware.

Can you help please!