Why does this happen when I try to playtest?

[SL1MSHADY]

when i playtest, why does this pop up appear? once i press okay, the playtest screen dissappears.
http://fc95.deviantart.com/fs40/f/2009/017/9/3/RPGXP_question_by_PokemonEclipse.png
Can someone please help?

[Ausaudriel]

I have no idea what application you're trying to run, but the Community Questions & Feedback forum is only for questions relating to PokeCommunity, as in, our forums.

I suggest you contact the creator of the program you're trying to run and ask them how to use it. ^^;