users can't write in my presebtation

hello,

My company bought Adobe Captivate 4.

I made a tutorial and i ask users to write a text.

On some pc, they can write but some others not.

I don't know why.

You can dowload the videoflash here :

http://aatogether.free.fr/trte_captivate/saad/TP.exe

The caption is the 19/26.

It's in french.

If you?have some ideas ??

Thanks a lot.

Anthony

users can't write in my presebtation

It's done.

The caption text was in 100% transparency.