Since you say "Push Key" instead of "Action Key", I'm assuming it's RPG Maker 2000 from here on out.

Is page two of whatever event this is an autostart event (if it is, make it a Push Key event). Just because the first page isn't autostarting, that doesn't mean the second isn't.

What is the other event that's starting? Is it another page of the same event that you outlined above, or is it another event entirely that Page1 as blank, and Page2 with a precondition of [0008] being ON?

Are there ANY events being moved around after this event? If there are, make sure that they aren't running into walls - that'll stall the event from finishing the Move Event line..

Are there ANY autostart Common Events that rely on your [0008] switch?

Are there any other events in the room that have the [0008] switch as a precondition?

(Note that it could be anything I mentioned - this is because another event in the room can affect this one just by existing. You'll have to post the entire code of all events in the room in order to be sure of what caused it, as well as a layout of the room. Or you can upload it somewhere and let me see the entire program, heh. This is pretty much standard practice with any programming - ERROR ON LINE 40 might be caused by line 39 not having a semicolon, for example, so just posting the line where the error is won't help any)