Peerclick + Zeropark problem

[mambojambo]

I am having a problem with zeropark tracking,

I got from zeropark this postback url

i am having a problem with peerclick and zeropark

I got from zeropark http://zp-postback.com/zppostback/XXXXXXXXXXXXXXXXXXXXXXX?cid=

the XXXXXXXXXX is our identifer

the link I use for the campaign is this
https://peerclick.mywebsite.com/15GCZJ?campaign_id={campaign_id}&campaign_name={campaign_name}&geo={geo}&long_campaign_id={long_campaign_id}&target={target}&traffic_type={traffic_type}&visitor_type={visitor_type}&source={source}&cost={cost}&external_id={cid}


1. the peerclick.mywebsite.com is the custom domain URL we have set with peerclick and its working for other network (hilltopads)
2. what shall I put in the postback after the cid= ?
3. I talked to peer click and they told me that my error is Wrong CID
4. they also talked to me about click_id but I told know where to implement it
5. if you have any other input I would greatly appreciate it

thank you