Redirect rules

Hi,

I′m passing some parameters with the url sometimes, for example “/landingpage/?message=hello”. My params is being removed when the landing pages plugin redirects the page to A or B version. It just ignores my params. I want the redirect rules to add my params (if they exists) like for example “/landingpage/?lp-variation-id=0&message=hello”.

Can anyone help me how to do that? I need it for both apache and nginx.

Thanks,

/Per