[support] How to disable a wrong block when the site doesn't work

Hi Following a suggestion from a developer, I just added a PHP block to my site's default theme, and now the site cannot be accessed Fatal error: Call to undefined function: stock_do_quote() in /home/canalpda/public_html/includes/common.inc(1342) : eval()'d code on line 2 I need to disable that new block so everything works again. How can I access the site admin, probably using another theme or no theme at all so the bad block is disabled? I'm using Drupal 5.1 Thanks for any assistance. ---------------------------------------------------------------------- Albert