G2image on addon domain opens wordpress admin on primary domain

Directory setup:
/public_html/gzcrossfit/gallery2/

ekpenyong.us is the primary domain with wordpress installed in public_html
gzcrossfit.com is an addon domain with drupal installed that resides in the /public_html/gzcrossfit/ sub-directory.
I am dealing with gzcrossfit/gallery2/ (i.e. gzcrossfit.com).

When I use g2image in standalone or as part of tinymce, the "pop-up" window brings up the login screen for WP admin of ekpenyong.us. I can't get it to do anything else without getting a white screen and firefox happily telling me "done" in the bottom left corner.

I've searched and searched for a solution but cannot find one. Please help.

If you need more information, please let me know and I will get it to you.

Thanks for your help.