Unsuccessful downloads (OSX)

I have been trying to download psychtoolbox for the past few days, and
each time it indicates that it is downloading but never completes the
download or gives an error message. I have left the matlab window
open for >6 hours without any message appearing after "please be
patient...". I am running Matlab 7.6.0 and Mac OS 10.5.4. I've tried
re-downloading the subversion as well as the installer, but my results
have not changed.

The only possible clue I've noticed is that when I open matlab after
an attempted download, it says "Warning: MATLAB Toolbox Path Cache is
out of date and is not being used." However, there is no evidence of
psychtoolbox in my applications folder, nor do the commands
"PsychtoolboxVersion" or "PsychtoolboxRoot" bring up anything.

Any suggestions would be appreciated!