Navigate timline using multiple buttons

I'm doing a project for uni and I'm a beginner to Adobe Animate. 

I'm trying to create a simple interactive HTML doc. Using buttons to navigate a timeline I create.

My problem is the I have chosen to include multiple buttons in order to other parts of the timeline but none of them work upon clicking. My other standalone buttons work just not the multiple.

This is the actionscript I used could someone please help and suggest a solution :))

/* Stop at This Frame
The  timeline will stop/pause at the frame where you insert this code.
Can also be used to stop/pause the timeline of movieclips.
*/

this.stop();


/* Click to Go to Frame and Stop
Clicking on the specified symbol instance moves the playhead to the specified frame in the timeline and stops the movie.
Can be used on the main timeline or on movie clip timelines.

Instructions:
1. Replace the number 5 in the code below with the frame number you would like the playhead to move to when the symbol instance is clicked.
2.Frame numbers in EaselJS start at 0 instead of 1
*/

this.bankst_button.addEventListener("click", fl_ClickToGoToAndStopAtFrame_320.bind(this));

function fl_ClickToGoToAndStopAtFrame_320()
{
	this.gotoAndStop(320);
}

this.ludlowst_button.addEventListener("click", fl_ClickToGoToAndStopAtFrame_360.bind(this));

function fl_ClickToGoToAndStopAtFrame_360()
{
	this.gotoAndStop(360);
}

this.greenptav_button.addEventListener("click", fl_ClickToGoToAndStopAtFrame_400.bind(this));

function fl_ClickToGoToAndStopAtFrame_400()
{
	this.gotoAndStop(400);
}

this.ssmreturn_button.addEventListener("click", fl_ClickToGoToAndStopAtFrame_180.bind(this));

function fl_ClickToGoToAndStopAtFrame_180()
{
	this.gotoAndStop(180);
}