I've Install and create a new website in Joomla 1.5.20.

After I have produce a menu for an additional exterior url.

index.php?option=com_astroservices&task=displayServices&Itemid=54

If click that link within the browser address bar. it exhibiting the url link this.

http://localhost:81/astrology/index.php/component/astroservices/?task=displayServices

However i want link display link follows:

http://localhost:81/astrology/index.php?oprion=com_astroservices&task=displayServices

Anyone might help me.

You've triggered SEF Web addresses inside Joomla. Look into the Joomla configuration dialog and appearance for those who have an .htaccess file within the root directory.