It looks like your setup got mixed up with an old version of MB. The background on your screenshot is the MB login screen... You are having a path problem somewhere, maybe it\'s using an old compile of CS?
My recommendation: delete every version of PS that is on your system, along with all compiled folders, and even the sources, for there might be configuration files that have incorrect info. (You can of course back them up to some other, unrelated folder or zip them, if you wish to keep them).
Clean the registry by using regedit, find all entries that relate to CEL, Crystal Space, and of course PS itself, if any. Furthermore, search the registry for all folders you have installed / compiled / copied PS to, and remove all of these registry entries.
This should give you a fairly clean registry.
Open a command window and look at the output of \"set\", it may also have some paths that point to CS, CEL or PS. Remove these parts from c:\\autoexec.bat
Now download the sources to a fifferent folder and compile them there.
Make sure that your compiler (Visual Studio?) doesn\'t have any project info saved. To be sure, create an entirely new project and look through all project settings and paths.
This is how I would go about it, and see what it does.
Note that you may do serious damage to your system by messing with the registry, so be careful.