Tell us about yourself!
Since your username has a space in it you'll have to enclose it in double quotes for it to work correctly. For examplemount c "C:\Users\Tyler Hass\DOS - freesize 1000"Without the quotes around your target directory DOSBox will see the space and assume the next part is more parameters. It will still let you mount the folder "Tyler" but since that folder doesnt really exist on your hard drive there wont be anything in it to install.
Also, have you tried reinstalling?
When you open the 'dagger' folder what do you get when you use 'dir'? It seems that either DOSBox your start file is either not present or under a different name.