Problem Displaying Png On IE6

I'm using these codes to fix the png display problem in IE. The strange thing is that sometimes it works and sometimes it doesn't. I included these within or my htmls.

Solution 1:

Try using DD_belatedPNG instead.

It uses a different technique compared to most of the other IE6 .png fixes, and has in my experience been generally more reliable.

Be sure to precisely follow the instructions in the "Usage" section.

Solution 2:

Remove the period:

<!--[if lt IE 7]>