Backup Exec 15 agents

I was trying to add the agents to the machines that I wanted to backup but when I add the file RAWS32 and then try to run the setup file I get an error about the path and DVD?  A box pops up 32-bit media required, then current installation could not locate install media then when hit the browse but and go to the file for the agent software, it tell me The path selected is not valid installation DVD.  Which I have loaded already on the C: dr.