Clicking Login Button seems to go under the menu

When I click the login button... It seems to go under the menu.. WHen I am on the Calendar page of my template, it finally goes over the menu.. See Attachments for better clarrifications.

Is there a plugin order that is causing this.

Solved it!!

in file css/ie8.css you have to replace code:

.gk_popup { padding-bottom: 10px; }
with:

.gk_popup_wrap { border-bottom: 10px solid #101010; }