Saving problem

Hello,

I have the following problem. I create a word game with storyline. It is 'hangman' and I use words with 4-6 letters. I created the basic slide and then I duplicated it in order to add more words. After slide 17th I got the message that storyline could not save my project because of low memory. All the other applications were closed (and I do not have installed any 'unusual' applications - I mainly have Office). I lost some work and after that I started to save the project every time I added a new slide. Every 2nd slide I added the project could not be saved. I had to close storyline and open it again in order to add one more slide. At the end I gave up at slide 25. 25 slides sound very few to me. Do you know why I have this problem? What should I do? I use the trial version.

Many thank for any information on this.

Vassiliki Bouki