Hi,
If you are interested in fixing this problem, you are going to have to tell us a little more information than you have provided.
Please be sure to follow the instructions for installing and activating plugins: http://omeka.org/codex/Managing_Plugins
And please follow the directions for each specific plugin (all linked from this page), http://omeka.org/codex/Plugins
Then, if you still have trouble, please tell us which version of Omeka you are running, which plugins and their version numbers are installed, and very specifically the error messages you are receiving.
Thanks.