I am running GATK for first time. In galaxy i use Unified Genotyper. I am getting error as below mentioned.

##### ERROR ------------------------------------------------------------------------------------------

##### ERROR A USER ERROR has occurred (version 2.5-2-gf57256b): 
##### ERROR The invalid arguments or inputs must be corrected before the GATK can proceed
##### ERROR Please do not post this error to the GATK forum

##### ERROR
##### ERROR See the documentation (rerun with -h) for this tool to view allowable command-line arguments.
##### ERROR Visit our website and forum for extensive documentation and answers to 
##### ERROR commonly asked questions http://www.broadinstitute.org/gatk

##### ERROR
##### ERROR MESSAGE: Running with the -et NO_ET or -et STDOUT option requires a GATK Key file. Please see http://gatkforums.broadinstitute.org/discussion/1250/what-is-phone-home-and-how-does-it-affect-me#latest for more information and instructions on how to obtain a key.

##### ERROR ------------------------------------------------------------------------------------------