Hallo, I install this script. After I login I got error:

1267 Illegal mix of collations (latin1_swedish_ci,IMPLICIT) and (cp1250_general_ci,COERCIBLE) for operation '='
in:
[select id from admin_files where page = 'Můj obchod']
If you were entering information, press the BACK button in your browser and re-check the information you had entered to be sure you left no blank fields.

What do I have to do? Now I can't get access to admin...

Can you advise me, please?