Okay; if I remember correctly you have to have the CD (or an ISO) to play it, unfortunately. Or at least I wasn't able to get it running without it. There are copies of it on eBay for really cheap (like $3), so it shouldn't be too hard to find a copy. I'd send you mine but I don't want to get caught up in copyright crap. Or, it looks like it's available on Steam as well.
If you want to try your copy to see if it works though, you can just match my settings here:
Leave all the other tabs at their defaults. I have the ISO mounted as drive D in the mounts tab as well, but hopefully/maybe yours will work without it.
Also, I've attached my custom dosbox.conf file for the game. You'll need to hook this file up to the Custom DOSBox Configuration File field.
Thanks,
Jason