Why do i get a memory allocation error in Joomla 1.5?

Hi, Im developing locally a site in joomla 1.5, and when I try to install any image component, everytime I preview a page with images where this component are the server returns me a memory allocation error. I tried the last component, didnt work, so i uninstalled it, but now, when i try to go to the article manager page, the system throws me the infamous memory allocation error that is this:

Fatal error: Allowed memory size of 8388608 bytes exhausted (tried to allocate 266241 bytes) in C:\AppServ\www\futbol\libraries\joomla\environment\response.php on line 176

Why am I getting this Joomla allocation error? Maybe its some variable i didnt check in the installation process.
I recently reinstalled Joomla (i wanted a clean install for order purposes) and i restored tons of articles and tags info from the database and, you see, I really dont want to do this again… The entire system works fine, only the article manager is… fryed. how can i search and fix the problem?