database errors + login form

Hi
Im new to WPMUDEV and so far have to say i absolutely love it. I was using membership lite but needed more than 2 subscriptions so upgraded to the full version.

I am creating a membership site for golf coaching http://igolftv.com/dev and want to use the WP membership plugin to create 2 levels, Premium & Stranger or free.

Everything is going to plan so far ive created the levels added rules and created the subscriptions i have made a signup page http://igolftv.com/dev/?page_id=2 and am in the process of styling this page.

First issue I want to have a login form on this page. Is there an easy way to do this as im finding it difficult.

2nd issue (which may not be an issue) i am working with levels and changing rules etc and noticed the following error messages

WordPress database error: [Table 'web135-a-wor-560.wp_m_pings' doesn't exist]
SELECT * FROM wp_m_pings ORDER BY id ASC

WordPress database error: [Table 'web135-a-wor-560.wp_m_levelmeta' doesn't exist]
SELECT meta_value FROM wp_m_levelmeta WHERE meta_key = 'joining_ping' AND level_id = 7

WordPress database error: [Table 'web135-a-wor-560.wp_m_levelmeta' doesn't exist]
SELECT meta_value FROM wp_m_levelmeta WHERE meta_key = 'leaving_ping' AND level_id = 7

This means nothing to me so wouldnt mind some help..

Thirdly i setup the subscriptions to go through the paypal subscription gateway but because our paypal account isnt verified yet i had to go to the normal paypal one which is fine to start with however when i changed the location of the horrible paypal subscribe button to a link to my own it still shows the paypal one??

Thanks in advanced anyone that helps.