Gotopage(x) on list page does not work in PHPRunner 5.0

I apologise if this is not the right place to post this, or if this topic has been posted before. Have spent days searching forum and googling about this problem which is marring an otherwise fruitful enjoyment of PHPR.
I am running:

PHP Runner 5.0 (Build 444)

IE6
When user clicks Gotopage(x) at bottom of list page IE6 browser generates error:

Line: 1

Char: 1

Error: Object expected

Code: 0

URL: http:/www.xx_etc.com/xx_etc/xx_details_list.php
with message - "Problems with this Web page might prevent it from being displayed properly or functioning properly. In the future, you can display this messge by double-clicking the warnin icon displayed in the status bar."
Have tried to access same page from multiple PCs with different browsers and keep getting same result with projects compiled in PHPRunner 5.0 (Build 444). No such problem with PHPRunner 4 projects built earlier and which I am trying to port.
Interestingly error console in Mozilla Firefox browser reports that "GotoPage is not defined - java script:GotoPage(10)"
Is this a bug in PHPRunner 5.0? Any ideas how to fix this? Have looked in .php files, .js files, and template files, but do not know where to begin.
Grateful for any advice, otherwise will just have to stick with PHPRunner 4 series.
Thanks.
darkwa