Another tip more along the technical support lines. The game is very sensitive to what speed it’s running at and this includes that double tap to run. To get it to work at all, I had to slow down my PII by using moslo. It’s still temperamental even then. I assume this is an issue in DOSBox as well.
If you are trying to run the floppy version, it has similar problems with the adlib sound in that you either won’t hear any at all, or it will drop notes depending on just how much faster than expected your machine is. It worked for me once I slowed my machine down enough.