PHP problem

[acbatchelor]

I am trying to add the "on the fly" autothumbnailer to my store. After I installed it, when i try to go to the catalog's home page it says

 

"Parse error: syntax error, unexpected T_FUNCTION, expecting '&' or T_VARIABLE in /public_html/catalog/includes/functions/html_output.php on line 77"

 

I know HTML but not much about PHP so I need help fixing this. here is the code for html_output.php line 77

 

if (tep_not_null($parameters)) $image .= ' ' . $parameters;

 

i don't know if you need all of the code or not. if so just ask.