Membership buttons redirect back to same page

HI Guys

When I have the membership packages set on show on submission, a user click the add listing button, which takes them to the membership selct page, but when they selct a membership they redirect straight back to add listing membership package page again, without any redirect to either pay or submit listing information.

Any ideas?

Paul

p.s I did follow a forum link the other day which had a zip file submitted by Mark, but this hasnt cleared up the issue.

p.p.s Try not to be too technical with me