Problems with Optin Skin

Hi all,

I’m having a small conflict with the Enfold theme and a plugin. When I activate the plugin Optin Skin, my sidebar on the pages becomes very wide and the sidebar moves to the bottom of the page.

I’ve contacted Optin Skin first, they tested my site and found out that when they activate the basic theme, the problem dissapears and that I should contact you guys… So, now you are my next hope.. What can cause this problem and how to fix it?

Greetings,
Jelmer