I've been doing some detective work. It looked to me like the problem was probably in the javascript function named proceed. Here it is from my page:

 

function proceed(szHow,n) {

 var theform;
 if (window.navigator.appName.toLowerCase().indexOf("netscape") > -1)
 {
 theform = document.forms["EventLab"];
 var temp,temp1;
 temp = GetElementByName2(theform,"ctlMain__ctl0__ctl0:gallery1:currentpage");
 temp1 = GetElementByName2(theform,"ctlMain__ctl0__ctl0:gallery1:current_slideshow");
 temp.value=n;
 temp1.value=szHow;
 }
 else
 {
 theform = document.EventLab;
 theform.ctlMain__ctl0__ctl0_gallery1_currentpage.value=n;

 theform.ctlMain__ctl0__ctl0_gallery1_current_slideshow.value=szHow;

 }
 if(szHow=="Slideshow")
 window.setTimeout("__doPostBack('ctlMain:_ctl0:_ctl0:gallery1','')", 3000);
 else
__doPostBack('ctlMain:_ctl0:_ctl0:gallery1','')
 }
 
 This function is generated by your dll, so I have no control over it. However, I copied it out and pasted it into my page and renamed it from proceed() to go(), then made a link to it in my page so I could run the code myself. The NavigateURL in the link is simply void(go('Slideshow', 1))" To see what was going on, I added alerts for the javascript variables that are declared in the function. What I found was that after assignment both temp and temp1 are null. It looks like something is going wrong inside GetElementByName2().

 

I have no way of getting inside GetElementByName2(), so that may be as far as I can debug it. I still have no idea why it works on your demo pages by not my site.

 

Dennis