Flash Player won't display content in IE

The Flash 9 player on a system in our organization will not display content. Instead the flash window disappears and is replaced with a double quote symbol ("). Removal of the flash player, rebooting, then reinstalling gives the same result. It does this with multiple users (different logons) on this same system. System is XP Pro SP2 with IE6. I've also tried resetting the Security and Advanced options in IE back to defaults with the same result. I cannot find anything online about this problem. It was happening on another system here in the office but that system was wiped and reimaged due to other problems going on.

Any ideas would be appreciated.

Thanks,

Mike