Plugin Upgrade

I have an old plugin I am converting to work with 2.x and have run into an error and need a bit of help from anyone who might know the reason for this:

 

Error:

Warning (4096): Argument 1 passed to HtmlHelper::__construct() must be an instance of View, none given, called in …. on line 377

 

In the helper:

public function __construct()

{

       $this->View =& ClassRegistry::getObject('view'); // this is line 377 from the error log

       $this->init();

}

 

 

Any help would be greatly appreciated.

 

Dave