No, I 've not forgotten about you.... I didn't get an email wakeup call for your last but one post - did for the one above.

Ok - M/S renders ok - I'm guessing were you to play these files in Windows Media Player, they would play without problems. As I mentioined in my last post, there are often registry conflicts / setup errors that can cause playback or editing problems - "class not registered" messages are an indication of these.

GSpot can help identify these, even if it's not always the best program to sort them out. On the System menu is an item titled "List Codecs and other Filters". Click on that and look for items highlighted in red - these are the problem entries on your system. They will either need to be removed and replaced (with something else) or reinstalled and re-registered.