Tracking campaign with jquery get

Hello,
I´ve got an question concerning tracking campaign.

In a Mail the user click on a link
http://qr.domain.de/link/keyXYZ
This is redirected with a htacces RewriteRule to
http://www.domain.de/qrlink.php?Key=keyXYZ
This script makes two things
call via jquery $.get the url http://piwik.domain.de/piwik.php?idsite=1&pk_campaign=add&pk_kwd=MailSignature
and after that redirects via javascript to the real page http://www.domain.de/

I also tested loading to an other path like
http://www.domain.de/qrlink.php?pk_campaign=add&pk_kwd=MailSignature
(with the tracking code inside ... this call is shown in my dashboard)

The campaign link is generated by piwik and similar to the old "noscript" version.

But surprise this solution works fine but without tracking the campaign.

Some idea or help?