action.lasso was not found

[scduddi]

I am new at Lasso and have been getting an error that says action.lasso was not found. Here is some of my code:

<FORM ACTION='action.lasso' METHOD=POST name=searchform>

<H1><FONT FACE="Arial"><INPUT TYPE="hidden" NAME="-Database" VALUE="App_Pict_Db"><INPUT TYPE="hidden" NAME="-layout" VALUE="Web"><INPUT TYPE="hidden" NAME="-response" VALUE="search_results.lasso"><INPUT TYPE="hidden" NAME="-error" VALUE="search_error.htm">

Any advice or help would truly be appreciated. Thanks