Im Stuck... with DosBox on PSP :(

hi all,

my problem is that i have succesfully installed Dos box on my psp and it runs games but the thing is that i want to play Homm 1 + 2 (heroes of might and magic 1 + 2) first i tried Homm 1 it loaded up i saw the little Homm's cursor but a pop up came up and it said i need to insert a cd in the cd drive? and i also tried Homm 2 but the same thing happened why does it ask that Homm works perfectly on my computer and it does not say that message can someone help me and tell me a solution please