Maybe it's better that you update your DivX codec to the 5.21 version.. Otherwise you can try to reregister the divxdec.ax filter.
First unregister it:
Code:
regsvr32.exe /u C:\WINDOWS\SYSTEM32\divxdec.ax
Then re-register it:
Code:
regsvr32.exe C:\WINDOWS\SYSTEM32\divxdec.ax
Remember to change the C:\WINDOWS...... path to point to your file
