Getting Edwin to open Scheme file correctly with C-x C-f

I am learning SICP. I'm using Edwin 3.116 that installed with MIT-Scheme on my Windows 7 (32-bit) / AMD (64-bit) machine.

For the life of me I have not been able to discover why Edwin is unable to open and read a file correctly:

When I open an existing .scm file (with my code in it) Edwin just opens a blank buffer with my file name.
If I then save it, my code gets over-written with blankness. So clearly Edwin is not at pains to write.

Apart from not being able to find any answers, I have had no success with the following:

C-x C-f followed by full path D:\my-schemes\filename.scm (while the default directory was at C:.....)
M-x cd followed by d:\my-schemes followed by C-x C-f filename.scm
Quit, restart MIT-Scheme and re-try above commands
Uninstall-reinstall MIT-Scheme and re-try above commands

Is there something I have not done - like specify some parameter in some configuration file? (The Installation guide does not require any special config. for Windows, other than to follow the installer.)

I'm getting by with copy-pasting code from file-to-buffer and writing from buffer-to-file for now, but my scheming could be so much better if I could get Edwin to read too.

Solution

vutha's suggestion of installing in a directory without spaces didn't work for me because I needed to access files inside a folder with spaces in the name. But it pointed me in the right direction. There is a bug in versions 9.1 and 9.2 that completely brakes Edwin in Windows.

The only thing that worked was to uninstall the latest version (there is a uninst.exe file in the installation folder) and then install version 9.0.