Cannot create video file error

[Nik0906]

Hi and thanks for taking the time to read this.
I'm using Ulead Cool 3d v3.0 to create a 150 frame animation at 25fps (PAL).
Everything works fine until I try to create an AVI using File/create animation/video file. After processing to 100% (about 4 minutes) I get the error message "Cannot create video file" there's no explanation as to why.

I have checked the basics such as disk space, other programs interfering (thus using End it All prior to opening Cool 3D) but they work with other complicated stuff such as Pinnacle Studio 9 Plus.

On the create file settings I use:
Frame tab to Frame based
Genral tab is set to viseo only, 25fps, and clicking the standard radio button to select 720x576
Advanced tab is greyed out
Compression tab is set to None and data type is set to 24-Bit RGB (although I have tried 16 bit RGB and got the same result)

There have been no imports into this animation, in other words, everything was generated within Cool 3D.

I'd appreciate your help.
Thanks
Nik