Hello there! SOLUTION IN COMMENTS!

Today I figured out how to play "Harvester" with "DOSBox" and I played it till I faced this problem:

I know that there are many tutorials for this but I just can't get it to work...
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WHAT YOU NEED TO KNOW TO HELP ME:

• *I have installed DOSBox 0.74

• *My first disc is mounted on drive E:

• *I have already installed the game to this location shown below using the first disc:

• *In the same image above you can see that there's is a .conf file.
  I've edited it like this (in the field below) to make my game run from a shortcut
  the [sdl] section isn't meaningful that's why I'll add it just here and not further

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  1[autoexec]
  2# Lines in this section will be run at startup.
  3mount c c:\oldgames -freesize 1000
  4mount d e:\ -t cdrom -label Harvest
  5c:
  6cd\harvest
  7harvest
  8
  9[sdl]
  10fullscreen=false
  11fulldouble=false
  12fullresolution=900x675
  13windowresolution=900x675
  14output=opengl
  15hwscale=2.00
  16autolock=true
  17sensitivity=100
  18waitonerror=true
  19priority=higher,normal
  20mapperfile=mapper.txt
  21usescancodes=true
  

• *And this down below is what I wrote in to DOSBox shortcut Properties in the Target section:
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  1"C:\Program Files (x86)\DOSBox-0.74\DOSBox.exe" -noconsole -conf c:\oldgames\harvest\harvest.conf “c:\oldgames\harvest\harvest.exe”
  

• *And for no misunderstandings that's here in the image below:
  

• And YEAH it runs BUT still I can't continue to play my game beacuse I don't know how to change the disc.

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AND OF COURSE I TRIED THIS but it didn't wen't well...

• I tried to change the .conf file to this but it didn't work

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  1[autoexec]
  2# Lines in this section will be run at startup.
  3mount c c:\oldgames\harvest -t dir -freesize 400
  4imgmount d c:\oldgames\d1harvester.iso c:\oldgames\d2harvester.iso c:\oldgames\d3harvester.iso -t cdrom
  5c:
  6cd\harvest
  7harvest
  

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• AND I ALSO TRIED TO CHANGE THESE LITTLE "BITS" IN IT

• -t cdrom to -t iso

• imgmount d c: to imgmount e c:

• and even -freesize 400 to -freesize 1000 but I don't really know the meaning of this one!

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And after these tryout modifications it always ends up like below:

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If you know how to help then you would not only help me but many other people who find it hard to mount multiple images. I've searched many forums where people are searching for answers about the same thing and there's no precise answer which works! So please be friendly and help for the love of gamers! I love this game and I really want to finish it on DOSBox!

P.s. And if I get a working fix from someone then maybe I could make a real easy, detailed explanation thread of this problem.