Strange behaviour Banner Slideshow

[abcart_ecm]

Hi I did the proposed solution for getting my Banner Slideshow to work in all 3 languages:
english, german and spanish. The solution worked but with a strange side effect:
Everytime when I edit banner text on a slide, the slide disappears for 5 or 10 minutes
and after that it re-appears back in the slideshow. I deleted all the caches in the system,
also in firefox and refreshed the page several times in firefox but this doesn´t help.
I simply have to wait 5 or 10 minutes for the banner slide to come back again in the slideshow.

Why is this.

[abantecart]

URL would help looking into your problem

[abcart_ecm]

URL would help looking into your problem

Here is the url:  http://server.pcdoit.com

[abantecart]

Can not see what you report on your site. What browser do you have?

[abcart_ecm]

Can not see what you report on your site. What browser do you have?

firefox of course

I have following error reports:
Language definition "heading_title" is missing for "English"
Language definition "banner_manager_list" is missing for "Español"

Can the latter have something to do with my strange banner behaviour ?
How do I solve these errors ?

[Advisor]

Do you have adblock or similar extensions enabled in Firefox ?