Iframe and cookie question. Not cookie stuffing

I'm using PPC ads for a campaign. I personally don't think the merchants landing page is optimal. I believe I can increase my conversion rate by tailoring the landing page to the visitor based on the keywords. I'm creating a landing page which has my marketing for the merchant at the top and an iframe below that loading my affiliate link to thier ad with the caption "see below for more details".

Before I roll it out I want to make sure I get credit for any conversions. To test I cleared my cookies and loaded the affiliate link normally and received 4 cookies. I cleared the cookies and loaded my custom landing page and received only 3 cookies.

The cookies I receive are:
apmebf[2].txt, emjcd[2].txt and s1.srtk[1].txt

The cookie I am missing is
<merchant name>[2].txt

When the affiliate link is loaded in the browser normally, the address bar changes to a path on the merchant site with the query string '?src=cj&pcode=cj&cpath=aff&rsrc=aff'. I believe this process may be held up in the iframe or for some reason IE security isn't letting this one third party cookie through.

Does anyone know what cookies are required for proper tracking? I have a partial solution involving loading the affiliate link in partially hidden new window and closing that immediately after load. However, this is worthless for anyone with a popup blocker which is a significant amount of people.

Any help is appreciated.

 

Obvious stuff only comes to me once I post a question to a public forum Don't know why I'm fighting this when my affiliate has content links to set up on landing pages.

I am new to affiliates so I have an excuse.

Anyways, my question still stands though for future circumstances. Does an iframe typically break the tracking or perhaps in this case? Or does it typically work, and the missing cookie likely was unnecessary?

 

Some browsers allow third party cookies and in some browsers, like Internet Explorer, it depends on the privacy settings of the browser. In IE6 (Internet Explorer 6) with the default privacy setting of ‘Medium’, third party cookies will be deleted.

As it turns out, there is a simple solution. If you supply a ‘compact privacy policy’ with your page, then IE will treat the cookies with respect and let them through.

ASP.Net code
HttpContext.Current.Response.AddHeader("p3p", "CP=\""IDC DSP COR ADM DEVi TAIi PSA PSD IVAi IVDi CONi HIS OUR IND CNT\""")

PhP code
header('P3P:CP="IDC DSP COR ADM DEVi TAIi PSA PSD IVAi IVDi CONi HIS OUR IND CNT"');

For more information on this, please visit this url:
http://viralpatel.net/blogs/2008/12/how-to-set-third-party-cookies-with-iframe.html

 

i think iframe cookie is not working