VAST Ad Server player not showing ad

Hi guys,

I created a VAST Ad Server player and added this ad tag on the 'tag url' - http://ad.doubleclick.net/pfadx/idg.ca.scoregolf/;videoplaylist=SG-Daily;sz=1x1;dcmt=text/html;ord=? but no luck. But when I use this - http://ad.doubleclick.net/pfadx/AngelaSite;kw=nexuswrapper;sz=300x250;ord=4422567;dcmt=text/html it worked. I just observed that when I view the source of this URLs, the document structure is different.

http://ad.doubleclick.net/pfadx/idg.ca.scoregolf/;videoplaylist=SG-Daily...?
uses:

..... does NOT work.

while:

http://ad.doubleclick.net/pfadx/AngelaSite;kw=nexuswrapper;sz=300x250;or...
uses:

....

Any ideas?

Thank you so much..