button actions don't work with SWFAddress / AS2

Question

I used this code for another site and it worked fine, but now I have modified it for a new site and no buttons work whatsoever. I am still new to this so I am probably missing something simple.

I have given each navigation button an instance name ie. btn_X_0, _1, etc. For some frames, more than one type of button lead to these, so I have labelled the relevant buttons btn_contact1, 2 etc. On the timeline I have labelled relevant frames with the $ sign for SWFAddress.

I have my swfaddress script in the same folder as the fla.

Here is my code - help would be much appreciated!

    import SWFAddress;
stop();
/*
_root.onEnterFrame = function() {



*/
String.prototype.searchreplace = function(find, replace) {
    var string = this;
    var counter;
    while (counter<string.length) {
        var start = string.indexOf(find, counter);
        if (start == -1) {
            break;
        } else {
            var before = string.substr(0, start);
            var after = string.substr(start+find.length, string.length);
            string = before+replace+after;
            var counter = before.length+replace.length;
        }
    }
    return string;
};
// SWFAddress handling
SWFAddress.onChange = function() {
    var value = SWFAddress.getValue();
    //trace(value);
    var frame = _currentframe;
    gotoAndStop('$'+value);
    if (frame == _currentframe) {
        gotoAndStop('$/error/');
    }
    var title = 'Site';
    var names = SWFAddress.getPathNames();
    for (var i = 0; i<names.length; i++) {
        title += ' / '+names[i].substr(0, 1).toUpperCase()+names[i].substr(1);
    }
    title = title.split("-").join(" ");
    SWFAddress.setTitle(title);


    for (var i = 0; i<9; i++) {
    _root["btn_home_"+i].onRelease = function() {
        SWFAddress.setValue("/");
    };
}

for (var i = 0; i<9; i++) {
    _root["btn_what_"+i].onRelease = function() {
        SWFAddress.setValue("/What-We-Do/");
    };
}
for (var i = 0; i<9; i++) {
    _root["btn_five_"+i].onRelease = function() {
        SWFAddress.setValue("/How-We-Work/5-Facts");
    };
}
for (var i = 0; i<9; i++) {
    _root["btn_five1_"+i].onRelease = function() {
        SWFAddress.setValue("/How-We-Work/5-Facts");
    };
}