When i active gk_cache all only frontpage is reloaded

Hi everybody,

I have a strange problem with gk_cache.
I'm using the quickstart package gk_fashion (for joomla 3) on joomla 3.0.2.
When I activate the caching based on the documenation (https://www.gavick.com/documentation/joomla-extensions/extensions-for-joomla-1-6/gk-cahce-plugin/) only the URL changes and the frontpage is reloaded.
If I disable cache (and purge of cause), the site works as expected but is quite slow (initial loading of frontpage 50-70 seconds).

As soon as I reactivate caching, performance is as expected, but all links just reload the frontpage.

Has anybody hints for me or can anybody reconstruct the problem?

Thanks in advance for any hint,

I tested it with different configurations and two different hoster and on a local MAMP-System on my MAC:

1)
With Joomla 3.x.x it's always the same result (only frontpage is reloaded but URL changes, as long as a caching module is active (no matter wether caching is activated in GK_template)
2)
With Joomla 2.5.8 it's a bit different:
I tested it with an multi-language site (have only single-language one available).
Results:
The first loading of a site works perfect (even with caching).
The second load (reload or via link or menu) shows text, but images link to a different place (cache adds a folder in URL with language code, so image link breaks because of not being correct).

CAN ANYBODY CONFIRM THAT BUG?????
Or is there somebody with a working caching site where system and template is up-to-date?
I use Joomla 3.0.2 with default-language english and additional language german (up-to-date)
Template is gk_fashion (last update december 17th 2012)
URL is http://neu.edmb.de

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Looking for answers (working /not working cache).

i have bugs with caching too but with 2.5 . hope stuff will fix it